1. From the Department of Nutrition, Harvard School of Public Health, Boston, MA (RJdS and FMS); the General Clinical Research Center, Brigham and Women's Hospital, Boston, MA (RJdS and JFS); the Welch Center for Prevention, Epidemiology and Clinical Research, Johns Hopkins Medical Institutions, Baltimore, MD (LJA); the Channing Laboratory, Department of Medicine, Brigham and Women's Hospital and Ha