1. Department of Diabetes and Endocrinology, Tamaki-Aozora Hospital, Kitakashiya 56-1, Hayabuchi, Kokufucho, Tokushima 779-3125, Japan
2. Division of Endocrinology and Metabolism, Tokyo Metropolitan Children Medical Center, 2-8-29 Musashidai, Fuchu-shi, Tokyo 183-8561, Japan