1. From the College of Health (J.D.S.), University of Utah, Salt Lake City, Utah; the Division of Endocrinology (U.B.Z., C.N.A., A.E.M., J.C.R.), Clinical Nutrition, and Vascular Medicine, University of California, Davis, Calif; and the Department of Internal Medicine (S.R.L.), University of Iowa College of Medicine and Cardiovascular Center, VA Medical Center, Iowa City, Iowa.