1. Division of Gastroenterology, Hepatology, and Nutrition (R.K.), Cincinnati, Ohio 45229
2. Center for Human Nutrition (D.B., J.C.E., N.A., S.K.), Washington University School of Medicine, St Louis, Missouri 63110
3. Department of Pathology and Laboratory Medicine (K.D.S.), Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio 45229