1. Department of Endocrinology and Metabolism; Graduate School of Medicine; Yokohama City University; Yokohama Japan
2. Division of Immunology and Metabolism, Department of Internal Medicine II; Graduate School of Medicine, Hokkaido University; Sapporo Japan
3. Department of Endocrinology and Metabolism; Chigasaki Municipal Hospital; Chigasaki Kanagawa Japan
4. Department of Diabetes and Endocrinology; Kanto Rosai Hospital; Kawasaki Kanagawa Japan