1. Division of Endocrinology, Metabolism and Diabetes, and Program in Human Molecular Biology and Genetics (S.S., I.R.R., A.R.W., H.A.T., N.W., R.O.P., E.D.A.), University of Utah, School of Medicine, Salt Lake City, Utah 84112;
2. Division of Cardiology (A.P.M., S.E.L.), University of Utah School of Medicine, Salt Lake City, Utah 84132;
3. Department of Metabolic Disorders (J.P.B.), Merck Research Laboratories, Rahway, New Jersey 07065