1. Third Department of Medicine (K.E., H.M., Y.N., A.K., R.K.), Shiga University of Medical Science, Otsu, Shiga 520-2192, Japan
2. Department of Medicine (K.E., N.N., P.M.S., J.M.O.), Division of Endocrinology and Metabolism, University of California, San Diego, La Jolla, California 92093
3. Department of The Whittier Diabetes Institute (J.M.O.), University of California, San Diego, La Jolla, California 92093
4. Department of Veterans Administration Research Service (J.M.O.), San Diego, La Jolla, California 92161