Before revision: They have included clinicians, epidemiologists, and statisticians at the Channing Laboratory (of Brigham and Women's Hospital), Harvard Medical School, Harvard School of Public Health, and several Harvard-affiliated hospitals, including Brigham and Women's Hospital, Dana–Farber Cancer Institute, Children's Hospital Boston, and Beth Israel Deaconess Medical URL Nurses' Health Study official site - participating organizations Cohorts + Cohorts Study Year PI Enrollees Nurses' Health Study 1976 Frank Speizer 121,700 Nurses' Health Study II 1989 Walter Willett 116,430 Nurses' Health Study 3 2010 Jorge Chavarro target: 100,000 The Nurses' Health Study original cohort was established in 1976 by Dr. Frank Speizer.
After revision: They have included clinicians, epidemiologists, and statisticians at the Channing Laboratory (of Brigham and Women's Hospital), Harvard Medical School, Harvard School of Public Health, and several Harvard-affiliated hospitals, including Brigham and Women's Hospital, Dana–Farber Cancer Institute, Children's Hospital Boston, and Beth Israel Deaconess Medical URL Nurses' Health Study official site - participating organizations Cohorts + Cohorts Study Year PI Enrollees Nurses' Health Study 1976 Frank Speizer 121,700 Nurses' Health Study II 1989 Walter Willett 116,430 Nurses' Health Study 3 2010 Jorge Chavarro target: 100,000 The Nurses' Health Study original cohort was established in 1976 by Frank E. Speizer.