1. Department of Medicine, Taichung and Taipei Veterans General Hospital, National Yang-Ming University (W.-L.L., J.-W.C., C.-T.T., S.-J.L.), Taipei, Taiwan
2. The Departments of Medicine and Biological Chemistry, Division of Endocrinology, Diabetes, and Metabolism, University of California (T.I., M.K., P.H.W.), Irvine, California 92697