1. Division of Nutrition and Metabolic Diseases (V.S., A.K.A., A.G.), Center for Human Nutrition, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas 75390
2. Division of Endocrinology and Metabolism (E.A.O.), Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan 48109
3. Center for Human Genetics (J.-P.F.), University Hospital of Leuven, 3000–Leuven, Belgium