1. Division of Endocrinology, Metabolism and Diabetes (B.R.H., D.R.J., V.S., L.K.P., W.R.H., R.H.E.), Department of Medicine, University of Colorado Health Sciences Center, Denver, Colorado 80262
2. Institut de Genetique et de Biologie Moleculaire et Cellulaire (W.K., P.C.), Clinique de la Souris and College de France, 67404 Illkirch Cedex, Communaute Urbaine de Strasbourg, France
3. Center for Human Nutrition (R.H.E.), University of Colorado Health Sciences Center, Denver, Colorado 80262