1. From the School of Medicine (A.C.), University of East Anglia, Norwich, UK; the Department of Nutrition (S.E.C., E.B.R.) and the Department of Epidemiology (J.E.M., E.B.R.), Harvard School of Public Health, Boston, Mass; Channing Laboratory, Department of Medicine (J.E.M., E.B.R.) and the the Division of Preventive Medicine (J.E.M., K.M.R.), Brigham and Women’s Hospital and Harvard Medical School, Boston, Mass; and Merck Research Laboratories (C.J.G.), West Point, Pa.