1. From the Center for Health Services Research in Primary Care (M.J.C., V.A.S., M.K.O., S.D., E.Z.O., H.B.B., B.J.P.), Durham Veterans Affairs Medical Center, Durham, NC; Divisions of Endocrinology, Diabetes, and Metabolism (M.J.C.) and General Internal Medicine (E.Z.O., H.B.B., B.J.P.), Department of Medicine, and Departments of Biostatistics and Bioinformatics (M.K.O.) and Department of Psychiatry and Behavioral Sciences, and School of Nursing (H.B.B.), Duke University, Durham, NC.