1. From the Division of Preventive Medicine, Brigham and Women’s Hospital, Boston, MA (BM, JEB, and DAS); the Schepens Eye Research Institute, Boston, MA (KAT, MRD, JPG, and DAS); the Department of Ophthalmology, Massachusetts Eye and Ear Infirmary (MRD, JPG, DAS) and the Department of Ambulatory Care and Prevention (JEB), Harvard Medical School, Boston, MA; and the Department of Epidemiology, Harva