1. From the Division of Cardiovascular Medicine and Channing Laboratory, Brigham and Women's Hospital and Harvard Medical School, and Departments of Epidemiology and Nutrition, Harvard School of Public Health; Boston, MA (D.M.); Welch Center for Prevention, Epidemiology and Clinical Research, Johns Hopkins University, Baltimore, MD (L.J.A.); and Department of Preventive Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL (L.V.H.).