(University of Massachusetts at Amherst) Hankinson, who was the principal investigator of the Nurses’ Health Study cohort at Brigham and Women’s Hospital from 2006-11 and is now at UMass Amherst’s School of Public Health and Health Sciences, says the investigation will take two directions, both related to recent findings that suggest measuring only ‘the classic estrogens’ as risk biomarkers may miss ‘a sizeable component of estrogenic activity’ also relevant to risk.