1. From the Departments of Medicine, Divisions of Medical Genetics (J.R., R.R., F.C., A.S.N., G.P.J.) and Metabolism, Endocrinology, and Nutrition (S.M.), Genome Sciences (A.S.N.), Vascular Surgery (T.H., G.P.J.), and Biostatistics (P.H.), University of Washington, Seattle, Wash; Department of Surgery (T.K.), Veterans Affairs Puget Sound Health Care System, Seattle, Wash.