Curriculum Vitae: Zhen Chen, Ph.D.

Scopus Author ID: 37101034600 Researcher ID: M-3936-2017
ORCID ID: orcid.org/0000-0002-9946-1362

Biostatistics and Bioinformatics Branch
Division of Population Health Research
Division of Intramural Research
Eunice Kennedy Shriver National Institute of Child Health & Human Development 
National Institutes of Health
6710B Rockledge Dr., Room 3212 Bethesda, Maryland 20892 zhen.chen@nih.gov

Education

Academic & Research Experience

Mentoring

National Institutes of Health

University

Professional Activities

Editorial Positions

Journal Peer Reviewer

Medical/Epidemiological journals
American Journal of Epidemiology; Andrology; Annals of Epidemiology; Contraception; Epidemiology; Fertility and Sterility; Journal of the American Medical Association

Statistical journals
Annals of Statistics; Biometrics; Biostatistics; Computational Statistics and Data Analysis; International Statistical Review; Journal of Computational and Graphical Statistics; Lifetime Data Analysis; Statistical Methods in Medical Research; Statistics in Medicine; Statistical Sinica; Statistics in Biosciences; Naval Research Logistics

Grant Reviewer

Committee & Advisory Boards Appointments

Meeting and Conferences Organizing Roles

Society Memberships

Research Support

Principal Investigator, Eunice Kennedy Shriver National Institute of Child Health and Human Development Intramural Funding

Co-Investigator, Eunice Kennedy Shriver National Institute of Child Health and Human Development Intramural Funding

Co-Investigator, University of Pennsylvania

Honors & Awards

Teaching

Graduate

Undergraduate

Invited Talks and Seminars

1. A weighted kernel machine regression approach to environmental pollutants and infertility, University of Maryland, College Park, 2018.
2. Bayesian methods, latent class models, and individualize diagnostic accuracy (panelist), The 11th Annual FDA/AdvaMed Medical Devices and Diagnostics Statistics Conference, Washington DC, 2018
3. A Correlated Bayesian Rank Likelihood Approach to Multiple ROC Curves for Endometriosis, Conference on Bayesian Modeling, Computations, and Applications, Storrs, CT, 2018
4. A Bayesian multi-dimensional couple-based latent risk model for infertility, University of Cincinnati, Cincinnati, OH, 2018
5. Modeling of couple exposure to pollutants and their association to time to pregnancy, Georgetown University, Washington DC, 2017
6. Latent risk model for infertility, George Washington University, Washington DC, 2016
7. A placement-valued based approach to correlated ROC curves subject to stochastic constraints, John Hopkins University, Baltimore, MD, 2015
8. Estimating diagnostic accuracy of endometriosis without a gold standard: new sensitivity analysis approaches which address the problems with standard latent class models, International Biometric Conference, Florence, Italy, 2014
9. Marginal approach to missing data in measurement agreement, George Mason University, VA, 2013
10. Causal inference in analysis of pregnant related outcomes, John Hopkins University, Baltimore, MD, 2013
11. Recent development in constrained Bayesian analysis, University of South Carolina, Columbia, SC, 2013
12. A crossed random effects modeling approach for estimating diagnostic accuracy from ordinal ratings without a gold standard, International Chinese Statistical Association Applied Statistics Symposium, North Bethesda, MD, 2013
13. A Bayesian approach to limit of detection, University of Maryland at Baltimore County, MD, 2012
14. A Bayesian approach to limit of detection, International Chinese Statistical Association Applied Statistics Symposium, Boston, MA, 2012
15. A Bayesian approach to limit of detection, George Washington University, Washington DC, 2012
16. Latent class models for joint analysis of disease prevalence and high-dimensional chemical exposures, international toxicology of mixtures conference, Arlington, VA 2011
17. Robustness in linear models with informative cluster size, International Chinese Statistical Association Applied Statistics Symposium, New York, NY, 2011
18. Discussion of statistical methods in reproductive epidemiology, Joint Statistical Meeting, Washington DC, 2009
19. More accurate copy number variation calls in family SNP genotyping data using Bayesian hidden Markov models and inheritance vectors, National Institute of Child Health and Human Development, Rockville, MD, 2009
20. Copy number variation calls in family SNP genotyping data using Bayesian hidden Markov models and inheritance vectors, Thomas Jefferson University, Philadelphia, 2008
21. More accurate copy number variation calls in family SNP genotyping data using Bayesian hidden Markov models and inheritance vectors, Fox Chase Cancer Center, Philadelphia, 2008
22. More accurate copy number variation calls in family SNP genotyping data using Bayesian hidden Markov models and inheritance vectors, 57th American Society of Human Genetics Annual Meeting, San Diego, 2007
23. Modeling developmental toxicity endpoints: a causal inference approach, University of Connecticut, CT, 2007
24. Modeling developmental toxicity endpoints: a causal inference approach, Joint Meeting of Chinese Society of Probability and Statistics and Institute of Mathematical Sciences, Beijing, 2005
25. Modeling developmental toxicity endpoints: a causal inference approach, University of Pittsburgh, PA, 2005
26. Selecting factors predictive of heterogeneity in multivariate event time data, Eastern North American Region of International Biometric Society, Pittsburgh, PA, 2004
27. Modeling truncated count data with endogeneity in health service research, Peking University, Beijing, 2004
28. Random effects selection in linear mixed effects model, Rand Corporation, Santa Monica, CA, 2003
29. Random effects selection in linear mixed effects model, University of Texas M.D. Andersen Cancer Center, Houston, TX, 2003
30. Random effects selection in linear mixed effects model, University of Pennsylvania, Philadelphia, PA, 2003
31. Random effects selection in linear mixed effects model, Vanderbilt University, Nashville, TN, 2003
32. Random effects selection in linear mixed effects model, University of Iowa, Iowa City, IA, 2003
33. Random effects selection in linear mixed effects model, Eastern North American Region of International Biometric Society, Tampa, FL, 2003
34. A Bayesian approach for assessing heterogeneity in generalized linear models, National Institute of Environmental Health Sciences, Research Triangle Park, NC, 2002
35. A Bayesian approach for assessing heterogeneity in generalized linear models, University of North Carolina at Chapel Hill, Chapel Hill, NC, 2002
36. A Bayesian approach for assessing heterogeneity in generalized linear models, Statistical and Applied Mathematical Sciences Institute, Research Triangle Park, NC, 2002
37. A skewed multinomial probit model for discrete choice data, University of Maryland, Baltimore, MD, 2001
38. A skewed multinomial probit model for discrete choice data, North Carolina State University, Raleigh, NC, 2001
39. A skewed multinomial probit model for discrete choice data, National Institute of Environmental Health Sciences, Research Triangle Park, NC, 2001
40. A skewed multinomial probit model for discrete choice data, Bayesian Application and Methods in Marketing Conference, Columbus, OH, 2000

Contributed Talks at Professional Meetings

1. Estimation of ROC surfaces under stochastic and variability constraints, Eastern North American Region of International Biometric Society, Washington DC, 2017
2. A Bayesian high dimensional latent risk model for fecundity, Joint Statistical Meetings, Chicago, IL, 2016
3. A placement-valued based approach to correlated ROC curves subject to stochastic constraints, Eastern North American Region of International Biometric Society, Austin, TX, 2016
4. Estimation of ROC surfaces under stochastic and variability constraints, Joint Statistical Meetings, Seattle, WA, 2015
5. A rank-based ROC hierarchical model for correlated ROC curves, Eastern North American Region of International Biometric Society, Miami, FL, 2015
6. Marginal analysis of measurement agreement among multiple raters with non-ignorable missing ratings, Eastern North American Region of International Biometric Society, Orlando, FL, 2013
7. Bayesian order restricted inference of measurement agreement with an application to the Physician Reliability Study, Eastern North American Region of International Biometric Society, Washington DC, 2012
8. Bi-directional mixed effects models, Eastern North American Region of International Biometric Society, New Orleans, LA 2010
9. An integrated Bayesian hidden Markov model approach to CNVs incorporating pedigree information, ISBA 2010 World Meeting, Benidorm, Spain, 2010
10. More accurate copy number variation calls in family SNP genotyping data using Bayesian hidden Markov models and inheritance vectors, Eastern North American Region of International Biometric Society, Arlington, VA 2008
11. Detection of copy number variations from high-density SNP arrays: an integrated Bayesian hidden Markov model approach incorporating pedigree information, Joint Statistical Meetings, Denver, CO 2008
12. Bayesian frailty selection in Cox models, Joint Statistical Meetings, Salt Lake City, UT 2007
13. On estimating multinomial logit models with random effects, New England Statistics Symposium, Storrs, CT, 2001
14. Parametric discrete choice models based on the scale mixtures of multivariate normal distributions, Joint Statistical Meeting, Indianapolis, IN, 2000
15. A composite transition model for brand choice and purchase timing data, New England Statistics Symposium, Storrs, CT, 1999

Publications

Refereed Manuscripts (* Mentee first authored)

1. Chen Z, Kuo L. A note on the estimation of the multinomial logit model with random effects. The American Statistician. 2001; 55(2):89-95. DOI: 10.1198/000313001750358545 
2. Chen Z, Kuo L. Discrete choice models based on the scale mixtures of multivariate normal distributions. Sankhyā: The Indian Journal of Statistics, Series B. 2002; 64(2):192-213. Stable URL: http://www.jstor.org/stable/25053216 
3. Chen Z, Dunson DB. Random effects selection in linear mixed models. Biometrics. 2003; 59(4):762-769. PMID: 14969453
4. Dunson DB, Chen Z, Harry J. A Bayesian approach for joint modeling of cluster size and subunit-specific outcomes. Biometrics. 2003; 59(3):521-530. PMID: 14601753
5. Daniels JL, Longnecker MP, Klebanoff MA, Gray KA, Brock JW, Zhou H, Chen Z, Needham LL. Prenatal exposure to low-level polychlorinated biphenyls in relation to mental and motor development at 8 months. American Journal of Epidemiology. 2003; 157(6):485-492. PMID: 12631537
6. Chen Z, Dunson DB. Bayesian estimation of survival functions under stochastic precedence. Lifetime Data Analysis. 2004; 10(2):159-173. PMID: 15293630
7. Dunson DB, Chen Z. Selecting factors predictive of heterogeneity in multivariate event time data. Biometrics. 2004; 60(2):352-358. PMID: 15180660.
8. Kuo L, Chen Z. A state duration model for brand choice and inter-purchase time. Journal of Data Science. 2004; 2:125-147.
9. O’Brien PK, Kucharczuk JC, Marshall MB, Friedberg JS, Chen Z, Kaiser LR, Shrager JB. Comparative study of subxiphoid versus video-thoracoscopic pericardial “window”. Annals of Thoracic Surgery. 2005; 80(6):2013-2019. PMID: 16305836.
10. Longnecker MP, Klebanoff MA, Dunson DB, Guo X, Chen Z, Zhou H, Brock JW. Maternal serum level of the DDT metabolite DDE in relation to fetal loss in previous pregnancies. Environmental Research. 2005; 97(2):127-133. PMID: 15533328.
11. Hall CB, Verghese J, Sliwinski M, Chen Z, Katz M, Derby C, Lipton RB. Dementia incidence may increase more slowly after age 90: results from the Bronx Aging Study. Neurology. 2005; 65(6):882-886. PMID: 16186528.
12. Shrager JB, Nathan D, Brinster CJ, Yousuf O, Spence A, Chen Z, Kaiser LR. Outcomes after 151 extended transcervical thymectomies for myasthenia gravis. Annals of Thoracic Surgery. 2006; 82(5):1863-1869. PMID: 17062262.
13. Elliott MR, Joffe MM, Chen Z. A potential outcomes approach to developmental toxicity analyses. Biometrics. 2006; 62(2):352-360. PMID: 16918899.
14. Parker CS, Chen Z, Price M, Gross R, Metlay JP, Christie JD, Brensinger CM, Newcomb CW, Samaha FF, Kimmel SE. Adherence to warfarin assessed by electronic pill caps, clinician assessment, and patient reports: Results from the IN-RANGE study. Journal of General Internal Medicine. 2007; 22(9):1254-1259. PMID: 17587092. PMCID: PMC2219760.
15. Kealey C, Chen Z, Christie J, Thorn CF, Whitehead AS, Price M, Samaha FF, Kimmel SE. Warfarin and cytochrome P450 2C9 genotype: Possible ethnic variation in warfarin sensitivity. Pharmacogenomics. 2007; 8(3):217-225. PMID: 17324110.
16. Schelleman H, Chen Z, Kealey C, Whitehead AS, Christie J, Price M, Brensinger CM, Newcomb CW, Thorn CF, Samaha FF, Kimmel SE. Warfarin response and vitamin K epoxide reductase complex 1 in African Americans and Caucasians. Clinical Pharmacology & Therapeutics. 2007; 81(5):742-747. PMID: 17329985.
17. Kimmel SE, Chen Z, Price M, Parker CS, Metlay JP, Christie JD, Brensinger CM, Newcomb CW, Samaha FF, Gross R. The influence of patient adherence on anticoagulation control with warfarin: results from the International Normalized Ratio Adherence and Genetics (IN-RANGE) Study. Archives of Internal Medicine. 2007; 167(3):229-235. PMID: 17296877.
18. Friscia ME, Zhu J, Kolff JW, Chen Z, Kaiser LR, Deutschman CS, Shrager JB. Cytokine response is lower after lung volume reduction through bilateral thoracoscopy versus sternotomy. Annals of Thoracic Surgery. 2007; 83(1):252-256. PMID: 17184673.
19. Groeneveld PW, Kruse GB, Chen Z, Asch DA. Variation in cardiac procedure use and racial disparity among Veterans Affairs Hospitals. American Heart Journal. 2007; 153(2):320-327. PMID: 17239696.
20. Polsky D, Lave J, Klusaritz H, Jha A, Pauly MV, Cen L, Xie H, Stone R, Chen Z, Volpp K. Is lower 30-day mortality posthospital admission among blacks unique to the Veterans Affairs health care system? Medical Care. 2007; 45(11):1083-1089. PMID: 18049349.
21. Guzzo TJ, Levin BM, Lee R, Guo M, Chen Z, Whittington R, Tomaszewski J, Malkowicz SB. Relationship of biochemical outcome to percentage of positive biopsies in men with clinically localized prostate cancer treated with permanent interstitial brachytherapy. Urology. 2008; 71(4):723-727. PMID: 18387401.
22. Canter D, Guzzo TJ, Resnick MJ, Brucker B, Vira M, Chen Z, Tomaszewski J, VanArsdalen K, Wein AJ, Malkowicz SB. Hydronephrosis is an independent predictor of poor clinical outcome in patients treated for muscle-invasive transitional cell carcinoma with radical cystectomy. Urology. 2008; 72(2):379-383. PMID: 18514771.
23. Meropol SB, Chan KA, Chen Z, Finkelstein JA, Hennessy S, Lautenbach E, Platt R, Schech SD, Shatin D, Metlay JP. Adverse events associated with prolonged antibiotic use. Pharmacoepidemiology and Drug Safety. 2008; 17(5):523-532. PMID: 18215001. PMCID: PMC4269235.
24. Polsky D, Jha AK, Lave J, Pauly MV, Cen L, Klusaritz H, Chen Z, Volpp KG. Short- and long-term mortality after an acute illness for elderly whites and blacks. Health Services Research. 2008; 43(4):1388-1402. PMID: 18355259. PMCID: PMC2517279.
25. Hubbard RD, Chen Z, Winkelstein BA. Transient cervical nerve root compression modulates pain: Load thresholds for allodynia and sustained changes in spinal neuropeptide expression. Journal of Biomechanics. 2008; 41(3):677-685. PMID: 17976629. PMCID: PMC2270480.
26. Lee I, Thompson S, Lautenbach E, Gasink LB, Watson B, Fishman NO, Chen Z, Linkin DR. Effect of accessibility of influenza vaccination on the rate of childcare staff vaccination. Infection Control and Hospital Epidemiology. 2008; 29(5):465-467. PMID: 18419374. PMCID: PMC3697428.
27. Casarett D, Pickard A, Bailey FA, Ritchie C, Furman C, Rosenfeld K, Shreve S, Chen Z, Shea JA. Do palliative consultations improve patient outcomes? Journal of the American Geriatrics Society. 2008; 56(4):593-599. PMID: 18205757.
28. Wang K, Chen Z, Tadesse MG, Glessner J, Grant SF, Hakonarson H, Bucan M, Li M. Modeling genetic inheritance of copy number variations. Nucleic Acids Research. 2008; 36(21):e138. PMID: 18832372. PMCID: PMC2588508.
29. Kimmel SE, Christie J, Kealey C, Chen Z, Price M, Thorn CF, Brensinger CM, Newcomb CW, Whitehead AS. Apolipoprotein E genotype and warfarin dosing among Caucasians and African Americans. Pharmacogenomics Journal. 2008; 8(1):53-60. PMID: 17325732.
30. Schelleman H, Chen J, Chen Z, Christie J, Newcomb CW, Brensinger CM, Price M, Whitehead AS, Kealey C, Thorn CF, Samaha FF, Kimmel SE. Dosing algorithms to predict warfarin maintenance dose in Caucasians and African Americans. Clinical Pharmacology & Therapeutics. 2008; 84(3):332-339. PMID: 18596683. PMCID: PMC2538606.
31. Meropol SB, Chen Z, Metlay JP. Reduced antibiotic prescribing for acute respiratory infections in adults and children. British Journal of General Practice. 2009; 59(567):e321-8. PMID: 19843412. PMCID: PMC2751936.
32. Platt AB, Field SH, Asch DA, Chen Z, Patel NP, Gupta R, Roche DF, Gurubhagavatula I, Christie JD, Kuna ST. Neighborhood of residence is associated with daily adherence to CPAP therapy. Sleep. 2009; 32(6):799-806. PMID: 19544757. PMCID: PMC2690568
33. Myocardial Infarction Genetics Consortium, Kathiresan S, Voight BF, Purcell S, Musunuru K, Ardissino D, Mannucci PM, Anand S, Engert JC, Samani NJ, Schunkert H, Erdmann J, Reilly MP, Rader DJ, Morgan T, Spertus JA, Stoll M, Girelli D, McKeown PP, Patterson CC, Siscovick DS, O’Donnell CJ, Elosua R, Peltonen L, Salomaa V, Schwartz SM, Melander O, Altshuler D, Merlini PA, Berzuini C, Bernardinelli L, Peyvandi F, Tubaro M, Celli P, Ferrario M, Fetiveau R, Marziliano N, Casari G, Galli M, Ribichini F, Rossi M, Bernardi F, Zonzin P, Piazza A, Mannucci PM, Schwartz SM, Siscovick DS, Yee J, Friedlander Y, Elosua R, Marrugat J, Lucas G, Subirana I, Sala J, Ramos R, Kathiresan S, Meigs JB, Williams G, Nathan DM, MacRae CA, O’Donnell CJ, Salomaa V, Havulinna AS, Peltonen L, Melander O, Berglund G, Voight BF, Hirschhorn JN, Asselta R, Duga S, Spreafico M, Daly MJ, Parcell S, Nemesh J, Korn JM, McCarroll SA, Schwartz SM, Yee J, Lucas G, Surti A, Guiducci C, Gianniny L, Mirel D, Parkin M, Burtt N, Gabriel SB, Samani NJ, Thompson JR, Braund PS, Wright BJ, Balmforth AJ, Ball SG, Hall A; Wellcome Trust Case Control Consortium, Schunkert H, Erdmann J, Linsel-Nitschke P, Lieb W, Ziegler A, König IR, Hengstenberg C, Fisher M, Stark K, Grosshennig A, Preuss M, Wichmann HE, Schreiber S, Samani NJ, Erdmann J, Ouwehand W, Deloukas P, Scholz M, Cambien F, Reilly MP, Li M, Chen Z, Wilensky R, Matthai W, Qasim A, Hakonarson HH, Devaney J, Burnett MS, Pichard AD, Kent KM, Satler L, Lindsey JM, Waksman R, Knouff CW, Wilensky R, Matthai W, Qasim A, Devaney J, Burnett MS, Pichard AD, Kent KM, Satler L, Waterworth DM, Walker MC, Mooser V, Epstein SE, Rader DJ, Scheffold T, Berger K, Huge A, Girelli D, Martinelli N, Olivieri O, Corrocher R, Morgan T, Spertus JA, McKeown P, Patterson CC, Erdmann E, Hólm H, Thorleifsson G, Thorsteinsdottir U, Stefansson K, Engert JC, Do R, Xie C, Anand S, Kathiresan S, Ardissino D, Mannucci PM, Siscovick D, O’Donnell CJ, Samani NJ, Melander O, Elosua R, Peltonen L, Salomaa V, Schwartz SM, and Altshuler D. Genome-wide association of early-onset myocardial infarction with single nucleotide polymorphisms and copy number variants. Nature Genetics. 2009; 41(3):334-341. PMID: 19198609. PMCID: PMC2681011.
34. Muntner P, Anderson A, Charleston J, Chen Z, Ford V, Makos G, O’Connor A, Perumal K, Rahman M, Steigerwalt S, Teal V, Townsend R, Weir M, Wright JT Jr; Chronic Renal Insufficiency (CRIC) Study Investigators. Hypertension awareness, treatment, and control in adults with CKD: Results from the Chronic Renal Insufficiency Cohort (CRIC) Study. American Journal of Kidney Diseases. 2010; 55(3):441-451. PMID: 19962808. PMCID: PMC2866514.
35. Chetty-John S, Zhang J, Chen Z, Albert P, Sun L, Klebanoff M, Grewal U. Long-term physical and neurologic development in newborns with isolated single umbilical artery. American Journal of Obstetrics & Gynecology. 2010; 203(4):368.e1-368.e7. PMID: 20723870. PMCID: PMC3454509.
36. Munson JC, Kreider M, Chen Z, Christie JD, Kimmel SE. Effect of treatment guidelines on the initial management of idiopathic pulmonary fibrosis. British Journal of Clinical Pharmacology. 2010; 70(1):118-125. PMID: 20642554. PMCID: PMC2909814.
37. Munson JC, Kreider M, Chen Z, Christie JD, Kimmel SE. Factors associated with the use of corticosteroids in the initial management of idiopathic pulmonary fibrosis. Pharmacoepidemiology and Drug Safety. 2010; 19(7):756-762. PMID: 20582912. PMCID: PMC2898153.
38. Levine J, Kofke A, Cen L, Chen Z, Faerber J, Elliott JP, Winn HR, Le Roux P. Red blood cell transfusion is associated with infection and extracerebral complications after subarachnoid hemorrhage. Neurosurgery. 2010; 66(2):312-318. PMID: 20042985.
39. Magge SN, Chen HI, Ramakrishna R, Cen L, Chen Z, Elliott JP, Winn HR, Le Roux PD. Association of a younger age with an increased risk of angiographic and symptomatic vasospasms following subarachnoid hemorrhage. Journal of Neurosurgery. 2010; 112(6):1208-1215. PMID: 19835470.
40. Platt AB, Kuna ST, Field SH, Chen Z, Gupta R, Roche DF, Christie JD, Asch DA. Adherence to sleep apnea therapy and use of lipid-lowering drugs: A study of the healthy-user effect. Chest. 2010; 137(1):102-108. PMID: 19820075. PMCID: PMC2803121.
41. Chen Z, Zhang B, Albert PS. A joint modeling approach to data with informative cluster size: robustness to the cluster size model. Statistics in Medicine. 2011; 30(15):1825-1836. PMID: 21495060. PMCID: PMC3115426.
42. Louis GM, Lum KJ, Sundaram R, Chen Z, Kim S, Lynch CD, Schisterman EF, Pyper C. Stress reduces conception probabilities across the fertile window: Evidence in support of relaxation. Fertility and Sterility. 2011; 95(7):2184-2189. PMID: 20688324. PMCID: PMC2975045.
43. Zhang J, Branch DW, Ramirez MM, Laughon SK, Reddy U, Hoffman M, Bailit J, Kominiarek M, Chen Z, Hibbard JU. Oxytocin regimen for labor augmentation, labor progression, and perinatal outcomes. Obstetrics & Gynecology. 2011; 118(2 Pt 1):249- 256. PMID: 21775839. PMCID: PMC3655689.
44. Buck Louis GM, Schisterman EF, Sweeney AM, Wilcosky TC, Gore-Langton RE, Lynch CD, Boyd Barr D, Schrader SM, Kim S, Chen Z, Sundaram R. Designing prospective cohort studies for assessing reproductive and developmental toxicity during sensitive windows of human reproduction and development - the LIFE Study. Paediatric & Perinatal Epidemiology. 2011; 25(5):413-424. PMID: 21819423. PMCID: PMC4118054.
45. Buck Louis GM, Hediger ML, Peterson CM, Croughan M, Sundaram R, Stanford J, Chen Z, Fujimoto VY, Varner MW, Trumble A, Giudice LC; ENDO Study Working Group. Incidence of endometriosis by study population and diagnostic method: the ENDO Study. Fertility and Sterility. 2011; 96(2):360-365. PMID: 21719000. PMCID: PMC3143230.
46. *Zhang B, Chen Z, Albert PS. Latent class models for joint analysis of disease prevalence and high-dimensional semicontinuous biomarker data. Biostatistics. 2012; 13(1):74-88. PMID: 21908867. PMCID: PMC3276274.
47. Buck Louis GM, Sundaram R, Schisterman EF, Sweeney AM, Lynch CD, Gore-Langton RE, Chen Z, Kim S, Caldwell KL, Barr DB. Heavy Metals and Couple Fecundity, the LIFE Study. Chemosphere. 2012; 87(11):1201-1207. PMID: 22309709. PMCID: PMC3327819.
48. Buck Louis GM, Chen Z, Peterson CM, Hediger ML, Croughan MS, Sundaram R, Stanford JB, Varner MW, Fujimoto VY, Giudice LC, Trumble A, Parsons PJ, Kannan K. Persistent lipophilic environmental chemicals and endometriosis: the ENDO Study. Environmental Health Perspectives. 2012; 120(6):811-816. PMID: 22417635. PMCID: PMC3385438.
49. Kunisue T, Chen Z, Buck Louis GM, Sundaram R, Hediger ML, Sun L, Kannan K. Urinary concentrations of benzophenone-type UV filters in U.S. women and their association with endometriosis. Environmental Science and Technology. 2012; 46(8):4624-4632. PMID: 22417702. PMCID: PMC3352028.
50. Schliep KC, Stanford JB, Chen Z, Zhang B, Dorais JK, Boiman Johnstone E, Hammoud AO, Varner MW, Buck Louis GM, Peterson CM. Inter- and Intrarater Reliability in the Diagnosis and Staging of Endometriosis. Obstetrics & Gynecology. 2012; 120(1):104- 112. PMID: 22914398.
51. Reddy UM, Zhang J, Sun L, Chen Z, Raju TN, Laughon SK. Neonatal mortality by attempted route of delivery in early preterm birth. American Journal of Obstetrics & Gynecology. 2012; 207(2):117.e1-117.e8. PMID: 22840720. PMCID: PMC3408612.
52. Buck Louis GM, Peterson CM, Chen Z, Hediger ML, Croughan MS, Sundaram R, Stanford JB, Fujimoto VY, Varner MW, Giudice LC, Kennedy A, Sun L, Wu Q, Kannan K. Perfluorochemicals and endometriosis: the ENDO Study. Epidemiology. 2012; 23(6):799-805. PMID: 22992575. PMCID: PMC4122261.
53. Danaher MR, Roy A, Chen Z, Mumford SL, Schisterman EF. Minkowski-Weyl priors for models with parameter constraints: an analysis of the BioCycle Study. Journal of the American Statistical Association. 2012; 107(500):1395-1409. PMID: 27099406. PMCID: PMC4834988.
54. *Zhang B, Chen Z, Albert PS. Estimating diagnostic accuracy of raters without a gold standard by exploiting a group of experts. Biometrics. 2012; 68(4):1294-1302. PMID: 23006010. PMCID: PMC3530625.
55. Zhang Z, Chen Z, Troendle JF, Zhang J. Causal inference on quantiles with an obstetric application. Biometrics. 2012; 68(3):697-706. PMID: 22150612.
56. Roy A, Danaher M, Mumford SL, Chen Z. A Bayesian order-restricted model for hormonal dynamics during menstrual cycles of healthy women. Statistics in Medicine. 2012; 31(22):2428-2440. PMID: 22147446.
57. Schildcrout JS, Mumford SL, Chen Z, Heagerty PJ, Rathouz PJ. Outcome-dependent sampling for longitudinal binary response data based on a time-varying auxiliary variable. Statistics in Medicine. 2012; 31(22):2441-2456. PMID: 22086716. PMCID: PMC3432177.
58. Chason RJ, McLain AC, Sundaram R, Chen Z, Segars JH, Pyper C, Buck Louis GM. Preconception stress and the secondary sex ratio: a prospective cohort study. Fertility and Sterility. 2012; 98(4):937-941. PMID: 22884014. PMCID: PMC4110952.
59. Thoma ME, Hediger ML, Sundaram R, Stanford JB, Peterson CM, Croughan MS, Chen Z, Buck Louis GM; ENDO Study Working Group. Comparing apples and pears: Women’s perceptions of their body size and shape. Journal of Women’s Health. 2012; 21(10):1074-1081. PMID: 22873752. PMCID: PMC3466911.
60. Tang LL, Liu A, Chen Z, Schisterman EF, Zhang B, Miao Z. Nonparametric ROC summary statistics for correlated diagnostic marker data. Statistics in Medicine. 2013; 32(13): 2209-2220. PMID: 23055248. PMCID: PMC3578098.
61. Jin M, Liu A, Chen Z, Li Z. Sequential testing of measurement errors in inter-rater reliability studies. Statistical Sinica. 2013; 23(4):1743-1759. PMID: 25525316. PMCID: PMC4267541.
62. Kim S, Chen Z, Zhang Z, Simons-Morton BG, Albert PS. Bayesian hierarchical Poisson regression models: an application to a driving study with kinematic events. Journal of the American Statistical Association. 2013; 108(502):494-503. PMID: 24076760. PMCID: PMC3783969.
63. *Xie Y, Chen Z, Albert PS. A crossed random effects modeling approach for estimating diagnostic accuracy from ordinal without a gold standard. Statistics in Medicine. 2013; 32(20):3472-3485. PMID: 23529923. PMCID: PMC3740052.
64. Buck Louis GM, Sundaram R, Schisterman EF, Sweeney AM, Lynch CD, Gore-Langton RE, Maisog J, Kim S, Chen Z, Barr DB. Persistent environmental pollutants and couple fecundity: the LIFE Study. Environmental Health Perspectives. 2013; 121(2):231-236. PMID: 23151773. PMCID: PMC3569685.
65. Mendola P, Laughon SK, Mӓnnistö TI, Leishear K, Reddy UM, Chen Z, Zhang J. Obstetric complications among US women with asthma. American Journal of Obstetrics & Gynecology. 2013; 208(2):127.e1-8. PMID: 23159695. PMCID: PMC3557554.
66. Peterson CM, Johnstone EM, Hammoud AO, Stanford JB, Varner MW, Kennedy A, Chen Z, Sun L, Fujimoto VY, Hediger ML, Buck Louis GM; ENDO Study Working Group. Risk factors associated with endometriosis: Importance of study population for characterizing disease in the ENDO Study. Obstetrics & Gynecology. 2013; 208(6):451.e1-e11. PMID: 23454253. PMCID: PMC4114145.
67. Mӓnnistö TI, Mendola P, Grewal J, Xie Y, Chen Z, Laughon SK. Thyroid diseases and adverse pregnancy outcomes in a contemporary US cohort. The Journal of Clinical Endocrinology & Metabolism. 2013; 98(7):2725-2733. PMID: 23744409. PMCID: PMC3701274.
68. Wolff EF, Sun L, Hediger ML, Sundaram R, Peterson CM, Chen Z, Buck Louis GM. In utero exposures and endometriosis: the Endometriosis, Natural History, Disease, Outcome (ENDO) Study. Fertility & Sterility. 2013; 99(3):790-795. PMID: 23211710. PMCID: PMC3604121.
69. Pollack AZ, Louis GM, Chen Z, Peterson CM, Sundaram R, Croughan MS, Sun L, Hediger ML, Stanford JB, Varner MW, Palmer CD, Steuerwald AJ, Parsons PJ. Trace elements and endometriosis: The ENDO Study. Reproductive Toxicology. 2013; 42:41- 48. PMID: 23892002. PMCID: PMC3836840.
70. Buck Louis GM, Peterson CM, Chen Z, Croughan M, Sundaram R, Stanford J, Varner MW, Kennedy A, Giudice L, Fujimoto VY, Sun L, Wang L, Guo Y, Kannan K. Bisphenol A and phthalates and endometriosis, The Endometriosis: Natural History, Diagnosis and Outcomes Study. Fertility & Sterility. 2013; 100(1):162-9.e1-2. PMID: 23579005. PMCID: PMC3700684.
71. Bowers K, Laughon SK, Kiely M, Brite J, Chen Z, Zhang C. Gestational diabetes, pre- pregnancy obesity and pregnancy weight gain in relation to excess fetal growth: variations by race/ethnicity. Diabetologia. 2013; 56(6):1263-1271. PMID: 23571827.
72. Steuerwald AJ, Parsons PJ, Arnason J, Chen Z, Peterson CM, Louis GM. Trace element analysis of human urine collected after administration of Gd-based MRI contrast agents: characterizing spectral interferences using inorganic mass spectrometry. Journal of Analytical Atomic Spectrometry. 2013; 28(6):821-830. PMID: 27397951. PMCID: PMC4935091.
73. Mao S, Goodrich RJ, Hauser R, Schrader SM, Chen Z, Krawetz SA. Evaluation of the effectiveness of semen storage and sperm purification methods for spermatozoa transcript profiling. Systems Biology in Reproductive Medicine. 2013; 59(5):287-295. PMID: 23869956. PMCID: PMC3927401.
74. Chen Z, Xie Y. Marginal analysis of measurement agreement among multiple raters with non-ignorable missing ratings. Statistics and Its Interface. 2014; 7(1):113-120. DOI: http://dx.doi.org/10.4310/SII.2014.v7.n1.a12 
75. Ghosh G, Grewal J, Mӓnnistö T, Mendola P, Chen Z, Xie Y, Laughon SK. Racial/ethnic differences in pregnancy-related hypertensive disease in nulliparous women. Ethnicity and Disease. 2014; 24(3):283-289. PMID: 25065068. PMCID: PMC4171100
76. Prikh LI, Reddy UM, Mӓnnistö T, Mendola P, Sjaarda L, Hinkle S, Chen Z, Lu Z, Laughon SK. Neonatal outcomes in early term birth. American Journal of Obstetrics and Gynecology. 2014; 211(3):265.e1-265.e11. PMID: 24631438. PMCID: PMC4149822.
77. Mendola P, Mӓnnistö TI, Leishear K, Reddy UM Chen, Z, Laughon SK. Neonatal health of infants born to mothers with asthma. Journal of Allergy and Clinical Immunology. 2014; 133(1):85-90.e1-4. PMID: 23916153. PMCID: PMC3874245.
78. Buck Louis GM, Sundaram R, Schisterman EF, Sweeney A, Lynch CD, Kim S, Maisog JM, Gore-Langton R, Eisenberg ML, Chen Z. Semen quality and time to pregnancy: the Longitudinal Investigation of Fertility and the Environment Study. Fertility & Sterility. 2014; 101(2):453-462. PMID: 24239161. PMCID: PMC3946620.
79. Eisenberg ML, Kim S, Chen Z, Sundaram R, Schisterman EF, Buck Louis GM. The relationship between male BMI and waist circumference on semen quality: Data from the LIFE Study. Human Reproduction. 2014; 29(2):193-200. PMID: 24306102. PMCID: PMC3896223.
80. Schisterman EF, Mumford SL, Chen Z, Browne RW, Boyd Barr D, Kim S, Buck Louis GM. Lipid concentrations and semen quality: the LIFE Study. Andrology. 2014; 2(3):408-415. PMID: 24596332. PMCID: PMC3999259.
81. Schisterman EF, Mumford SL, Browne RW, Barr DB, Chen Z, Louis GM. Lipid concentrations and couple fecundity: the LIFE Study. The Journal of Clinical Endocrinology and Metabolism. 2014; 99(8):2786-2794. PMID: 24846535. PMCID: PMC4121020.
82. Johnstone EB, Louis GM, Parsons PJ, Steuerwald AJ, Palmer CD, Chen Z, Sun L, Hammoud AO, Dorais J, Peterson CM. Increased urinary cobalt and whole blood concentrations of cadmium and lead in women with uterine leiomyomata: Findings from the ENDO Study. Reproductive Toxicology. 2014; 49:27-32. PMID: 24994689. PMCID: PMC4280339.
83. Eisenberg ML, Kim S, Chen Z, Sundaram R, Schisterman EF, Louis GM. The relationship between male BMI and waist circumference on semen quality: data from the LIFE study. Human Reproduction. 2015; 30(2):493-494. PMID: 25516559. PMCID: PMC4303771.
84. Pollack AZ, Buck Louis GM, Chen Z, Sun L, Trabert B, Guo Y, Kannan K. Bisphenol A, benzophenone-type ultraviolet filters, and phthalates in relation to uterine leiomyoma. Environmental Research. 2015; 137:101-107. PMID: 25531814. PMCID: PMC4355097.
85. Goldstone AE, Chen Z, Perry MJ, Kannan K, Louis GM. Urinary Bisphenol A and Semen Quality, The LIFE Study. Reproductive Toxicology. 2015; 51:7-13. PMID: 25462789. PMCID: PMC4426021.
86. Louis GM, Chen Z, Schisterman EF, Kim S, Sweeney AM, Sundaram R, Lynch CD, Gore-Langton RE, Barr DB. Perfluorochemicals and human semen quality: the LIFE Study. Environmental Health Perspective. 2015; 123(1):57-63. PMID: 25127343. PMCID: PMC4286271.
87. Schisterman EF, Mumford SL, Schliep KC, Sjaarda LA, Stanford JB, Lesher LL, Wactawski-Wende J, Lynch AM, Townsend JM, Perkins NJ, Zarek SM, Tsai MY, Chen Z, Faraggi D, Galai N, Silver RM. Preconception low dose aspirin and time to pregnancy: findings from the effects of aspirin in gestation and reproduction randomized trial. The Journal of Clinical Endocrinology & Metabolism. 2015; 100(5):1785-1791. PMID: 25710565. PMCID: PMC4422888.
88. Trabert B, Chen Z, Kannan K, Peterson CM, Pollack AZ, Sun L, Buck Louis GM. Persistent organic pollutants (POPs) and fibroids: results from the ENDO Study. Journal of Exposure Science and Environmental Epidemiology. 2015; 25(3), 278–285. PMID: 24802554. PMCID: PMC4410838.
89. Eisenberg ML, Chen Z, Ye A, Buck Louis G. Relationship between physical occupational exposures and health on semen quality: Data from the Longitudinal Investigation of Fertility and the Environment (LIFE) Study. Fertility and Sterility. 2015; 103(5):1271-1277. PMID: 25765658. PMCID: PMC4417418.
90. Schliep KC, Mumford SL, Peterson CM, Chen Z, Johnstone EB, Sharp HT, Stanford JB, Hammoud AO, Sun L, Buck Louis GM. Pain typology and incident endometriosis. Human Reproduction. 2015; 30(10):2427-2438. PMID: 26269529. PMCID: PMC4573450.
91. Mumford SL, Kim S, Chen Z, Gore-Langton RE, Boyd Barr D, and Buck Louis GM. Persistent Organic Pollutants and Semen Quality: The LIFE Study. Chemosphere. 2015; 135:427-435. PMID: 25441930. PMCID: PMC4447619.
92. *Hwang BS, Chen Z. An Integrated Bayesian Nonparametric Approach for Stochastic and Variability Orders in ROC Curve Estimation: An Application to Endometriosis Diagnosis. Journal of the American Statistical Association. 2015; 110(511):923-934. PMID: 26839441. PMCID: PMC4733471.
93. Louis GM, Chen Z, Kim S, Sapra KJ, Bae J, Kannan K. Urinary concentrations of benzophenone-type ultraviolet light filters and semen quality. Fertility & Sterility. 2015; 104(4):989-996. PMID: 26253817. PMCID: PMC4592813.
94. Mumford SL, Kim S, Chen Z, Boyd Barr D, Buck Louis GM. Urinary Phytoestrogens Are Associated with Subtle Indicators of Semen Quality among Male Partners of Couples Desiring Pregnancy. Journal of Nutrition. 2015; 145(11):2535-2541. PMID: 26423741. PMCID: PMC4620723.
95. Bloom MS, Whitcomb BW, Chen Z, Ye A, Kannan K, Buck Louis GM. Associations between urinary phthalate concentrations and semen quality parameters in a general population. Human Reproduction. 2015; 30(11):2645-2657. PMID: 26350610. PMCID: PMC4605371.
96. Wallace ME, Mendola P, Chen Z, Hwang BS, Grantz KL. Preterm birth in the context of increasing income inequality. Maternal & Child Health Journal. 2015; 20(1):164-171. PMID: 26450504. PMCID: PMC6211180.
97. Männistö T, Mendola P, Kiely M, O’Loughlin J, Werder E, Chen Z, Ehrenthal DB, Grantz KL. Maternal psychiatric disorders and risk of preterm. Annals of Epidemiology. 2016; 26(1):14-20. PMID: 26586549. PMCID: PMC4688227.
98. Buck Louis GM, Barr DB, Kannan K, Chen Z, Kim S, Sundaram R. Paternal Exposures to Environmental Chemicals and Time-to-Pregnancy: Overview of Results from the LIFE Study. Andrology. 2016; 4(4):639-647. PMID: 27061873. PMCID: PMC4961554.
99. Sapra KJ, Eisenberg ML, Kim S, Chen Z, Buck Louis GM. Choice of underwear and male fecundity in a preconception cohort of couples. Andrology. 2016; 4(3):500-508. PMID: 26939021. PMCID: PMC6214186
100. Schliep KC, Mumford SL, Johnstone EB, Peterson CM, Sharp HT, Stanford JB, Chen Z, Backonja U, Wallace ME, Buck Louis GM. Sexual and physical abuse and gynecologic disorders. Human Reproduction. 2016; 31(8):1904-1912. PMID: 27334336. PMCID: PMC4974667.
101. Kim SS, Zhu Y, Grantz KL, Hinkle SN, Chen Z, Wallace ME, Smarr MM, Epps NM, Mendola P. Obstetric and neonatal risks among obese women without chronic disease. Obesity. 2016; 128(1):104-112. PMID: 27275800. PMCID: PMC4917420.
102. Buck Louis GM, Backonja U, Schliep KC, Sun L, Peterson CM, Chen Z. Women's Reproductive History Before the Diagnosis of Incident Endometriosis. Journal of Women's Health. 2016; 25(10):1021-1029. PMID: 27379997. PMCID: PMC5111831
103. Fan R, Chiu CY, Jung J, Weeks DE, Wilson AF, Bailey-Wilson JE, Amos CI, Chen Z, Mills JL, Xiong M. A comparison study of fixed and mixed effect models for gene level association studies of complex traits. Genetic Epidemiology. 2016; 40(8):702-721. PMID: 27374056. PMCID: PMC5567849
104. Bae J, Kim S, Chen Z, Eisenberg ML, Buck Louis GM. Human semen quality and the secondary sex ratio. Asian Journal of Andrology. 2017; 19(3):374-381. PMID: 26975484. PMCID: PMC5427797
105. Wallace ME, Mendola P, Kim SS, Epps N, Chen Z, Smarr M, Hinkle SN, Zhu Y, Grantz KL. Racial/ethnic differences in preterm perinatal outcomes. American Journal of Obstetrics and Gynecology. 2017; 216(3):306 e301-306 e312. PMID: 27865977. PMCID: PMC5572800
106. Schliep KC, Chen Z, Stanford JB, Xie Y, Mumford SL, Hammoud AO, Boiman Johnstone E, Dorais JK, Varner MW, Buck Louis GM, Peterson CM. Endometriosis diagnosis and staging by operating surgeon and expert review using multiple diagnostic tools: an inter-rater agreement study. BJOG: An International Journal of Obstetrics and Gynaecology. 2017; 124(2):220-229. PMID: 26435386. PMCID: PMC4821828
107. Whitcomb BW, Bloom MS, Kim S, Chen Z, Buck Louis GM. Male birthweight, semen quality and birth outcomes. Human Reproduction. 2017; 32(3):505-513. PMID: 28104697. PMCID: PMC5400075
108. Radin RG, Sjaarda LA, Perkins NJ, Silver RM, Chen Z, Lesher LL, Galai N, Wactawski- Wende J, Mumford SL, Schisterman EF. Low-Dose Aspirin and Sporadic Anovulation in the EAGeR Randomized Trial. Journal of Clinical Endocrinology and Metabolism. 2017; 102(1):86-92. PMID: 27754808. PMCID: PMC5413097
109. Backonja U, Hediger ML, Chen Z, Lauver DR, Sun L, Peterson CM, Buck Louis GM. Beyond Body Mass Index: Using Anthropometric Measures and Body Composition Indicators to Assess Odds of an Endometriosis Diagnosis. Journal of Women's Health. 2017; 26(9):941-950. PMID: 28537460. PMCID: PMC5646748
110. Zhang B, Liu W, Zhang Z, Qu Y, Chen Z, Albert PS. Modeling of Correlated Data with Informative Cluster Sizes: An Evaluation of Joint Modeling and Within-Cluster Resampling Approaches. Statistical Methods in Medical Research. 2017; 26(4):1881- 1895. PMID: 26113386.
111. Kawakita T, Bowers K, Hazrati S, Zhang C, Grewal J, Chen Z, Sun L, Grantz KL. Increased Neonatal Respiratory Morbidity Associated with Gestational and Pregestational Diabetes: A Retrospective Study. American Journal of Perinatology. 2017; 34(11):1160- 1168. PMID: 28738436. PMCID: PMC6113652.
112. Smarr MM, Kannan K, Chen Z, Kim S, Buck Louis GM. Male urinary paracetamol and semen quality. Andrology. 2017; 5(6):1082-1088. PMID: 28853221.
113. Eisenberg ML, Sapra KJ, Kim SD, Chen Z, Buck Louis GM. Semen quality and pregnancy loss in a contemporary cohort of couples recruited before conception: data from the Longitudinal Investigation of Fertility and the Environment (LIFE) Study. Fertility and Sterility. 2017; 108(4):613-619. PMID: 28863939. PMCID: PMC5657506
114. Nobles CJ, Schisterman EF, Ha S, Kim K, Mumford SL, Buck Louis GM, Chen Z, Liu D, Sherman S, Mendola P. Ambient air pollution and semen quality. Environmental Research. 2018; 163:228-236. PMID: 29459305. PMCID: PMC5878741
115. Smarr MM, Honda M, Kannan K, Chen Z, Kim S, Louis GMB. Male urinary biomarkers of antimicrobial exposure and bi-directional associations with semen quality parameters. Reproductive Toxicology. 2018; 77:103-108. PMID: 29474822. PMCID: PMC5878147
116. Buck Louis GM, Smarr MM, Sun L, Chen Z, Honda M, Wang W, Karthikraj R, Weck J, Kannan K. Endocrine disrupting chemicals in seminal plasma and couple fecundity. Environmental Research. 2018; 163:64-70. PMID: 29426029. PMCID: PMC5878734
117. * Hwang BS, Chen Z, M. Buck Louis G, Albert PS. A Bayesian multi-dimensional couple-based latent risk model with an application to infertility. Biometrics. 2018;0(0).
118. Chen Z, Hwang BS, Kim S. A correlated Bayesian rank likelihood approach to multiple ROC curves for endometriosis. Statistics in Medicine. 2019;38(8):1374-1385.
119. *Zhang W, Chen Z, Liu A, Buck Louis GM. A weighted kernel machine regression approach to environmental pollutants and infertility. Statistics in Medicine. 2019;38(5):809-827. PMID: 30328128
120. Choi G, Wang YB, Sundaram R, Chen Z, Barr DB, Buck Louis GM, Smarr MM. Polybrominated diphenyl ethers and incident pregnancy loss: The LIFE Study. Environmental Research. 2019;168:375-381. PMID: 30384231. PMCID: PMC6294303.
121. *Wang YB, Chen Z, Goldstein JM, Buck Louis GM, Gilman SE. A Bayesian regularized mediation analysis with multiple exposures. Statistics in Medicine. 2019;38(5):828-843. PMID: 30375022
122. Smarr MM, Kannan K, Sun L, Honda M, Wang W, Karthikraj R, Chen Z, Weck J, Buck Louis GM. Preconception seminal plasma concentrations of endocrine disrupting chemicals in relation to semen quality parameters among male partners planning for pregnancy. Environmental Research. 2018;167:78-86.

Manuscripts under Review (* Mentee first authored papers, ** Co-first authored)

1. **Kim, S, Chen, Z, Perkins, N, Schisterman, E, and Buck Louis, GM. A model-based approach to limit of detection in studying persistent environmental chemical exposures and human fecundity. Bayesian Analysis, under revision.
2. Kissell KA, Schisterman EF, Weck J, Danaher M, Hwang B, Chen Z, Wactawski-Wende J, Perkins NJ, Sjaarda L, Zarek S, and Mumford SL. Pregnancy history and adverse pregnancy outcomes and subsequent maternal serum anti-Müllerian hormone levels. Journal of Clinical Endocrinology & Metabolism, submitted.
3. Mendola, P, Seeni, I, Williams, A, Nobles, C, Chen, Z, and Sherman, S. Acute air pollution exposure and NICU admission: a case-crossover analysis. Annals of Epidemiology under revision.
4. Smarr, MM, Kim, S., Eisenberg, ML, Chen Z, and Buck Louis, GM. Predictors of male intercourse and ejaculatory frequency in a prospective U.S. pre-pregnancy cohort. Fertility & Sterility, submitted.