1. Department of Medicine (C.G.L., M.C.C., S.J.M., J.D.B.), Division of Metabolism, Endocrinology and Nutrition, University of Washington Medical Center, University of Washington, Seattle, Washington 98195
2. Departments of Family and Child Nursing (E.M., N.F.W.), University of Washington, Seattle, Washington 98195
3. Laboratory Medicine (M.H.W., W.L.C.), University of Washington, Seattle, Washington 98195
4. Veterans Affairs Puget Sound Health Care System (E.J.B.), Seattle, Washington 98108