The Nurses' Health Study Takes Fresh Aim at Breast Cancer as It Heads Into Decade FiveJAMA: The Journal of the American Medical AssociationForty years ago, Helene Glaser received a letter in the mail from Harvard epidemiologist Frank E. Speizer, MD. The letter invited Glaser, a 31-year-old nurse at the Lown Cardiovascular Group just outside of Boston, to participate in “a study of a major ...and more »