1. Division of Endocrinology and Metabolism, Department of Internal Medicine, Teikyo University School of Medicine, Tokyo 173-8605, Japan
2. Division of Endocrinology and Metabolism, Department of Internal Medicine, Shin-Kuki General Hospital, Saitama 346-0021, Japan
3. Teikyo Academic Research Center, Teikyo University, Tokyo 173-8605, Japan