Principal investigators

Nurses' Health Study

Francine Grodstein, ScD
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Francine Grodstein, ScD, has been the Director of the NHS since 2011. She is Professor of Medicine at Harvard Medical School, and Professor of Epidemiology at the Harvard T.H. Chan School of Public Health. Dr. Grodstein’s research focuses on healthy aging, particularly in women. She has led studies of cognitive function and incontinence in the Nurses’ Health Studies.

Shelley Tworoger, PhD
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Shelley Tworoger, PhD, has been the Associate Director of the NHS since 2016. She is Associate Professor of Medicine at Harvard Medical School, and Associate Professor of Epidemiology at the Harvard T.H. Chan School of Public Health. Dr. Tworoger leads ovarian cancer research efforts in the Nurses’ Health Studies. She is also the Faculty Advisor for the BWH/Harvard Cohorts Biorespository.

Meir Stampfer, MD, DrPH
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Meir Stampfer, MD, DrPH, has been the PI of the NHS since 2011. He was a founding co-investigator of the NHS II and remains a Senior Investigator with the study. He is Professor of Medicine at Harvard Medical School, and Professor of Epidemiology and Nutrition at the Harvard T.H. Chan School of Public Health. His research program is broadly concerned with the etiology of chronic diseases, with a particular focus on nutrition, cancer, and cardiovascular disease.

Susan Hankinson, RN, ScD
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Susan Hankinson, RN, ScD, was PI of the NHS from 2006-2010 and she remains a Senior Investigator with both the NHS and NHS II. She is currently Professor and Chair of the Department of Biostatistics & Epidemiology at the University of Massachusetts, Amherst and Adjunct Professor of Epidemiology at the Harvard T.H. Chan School of Public Health. Dr. Hankinson’s research has focused on the roles of lifestyle factors and endogenous hormones on breast cancer risk, as well as the use of biological markers in epidemiologic studies.

Graham Colditz, MD, DrPH
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Graham Colditz, MD, DrPH, was PI of the NHS from 2000-2006. He is also the founding PI of the Growing Up Today Study (GUTS), which enrolled children of NHS II participants. He is currently Chief of the Division of Public Health Sciences and the Niess-Gain Professor of Surgery at the Washington University School of Medicine in St. Louis. Dr. Colditz’s research is focused on the causes and prevention of chronic disease, including cancer, stroke, and diabetes, among women.

Frank Speizer, MD
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Frank Speizer, MD, is the founding Principal Investigator (PI) of the NHS. He remained in the PI role through 2000 and is currently a Senior Investigator with the Study. He is the Edward H. Kass Distinguished Professor of Medicine at Harvard Medical School and Professor of Environmental Science at the Harvard T.H. Chan School of Public Health. Dr. Speizer’s major research interests include chronic disease epidemiology, with a specific focus on respiratory and cardiovascular diseases and cancers in women, and health effects of air pollution.