Clinical Research and Adult Diabetes Sections, Joslin Diabetes Center, Harvard Medical School, Boston, Massachusetts. Electronic address: om.ganda@joslin.harvard.edu. Brigham and Women's Hospital Heart & Vascular Center, Harvard Medical School, Boston, Massachusetts. Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts. Cardiovascular Division, Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland. VA New England Healthcare System, Boston University School of Medicine, Boston, Massachusetts.