1. From the Sarah W. Stedman Nutrition and Metabolism Center (S.H.S., W.E.K., C.B.N.), Division of Cardiology (S.H.S., W.E.K.), Division of Endocrinology, Metabolism and Nutrition (C.B.N.), Center for Human Genetics, Department of Medicine (S.H.S.); and Department of Pharmacology and Cancer Biology (C.B.N.), Duke University Medical Center, Durham, NC.