1. Third Department of Internal Medicine (Y.T., K.T., Y.Y., T.K.), Faculty of Medicine, University of Tokyo, Tokyo 113, Japan
2. Institute for Diabetes Care and Research (Y.T., H.K., Y.A.), Asahi Life Foundation, Tokyo 100, Japan
3. Saitama Children’s Medical Center (D.K., Y.F.), Iwatsuki 339, Japan