1. Second Division, Department of Medicine, Hamamatsu University School of Medicine, Shizuoka, Japan
2. Department of Endocrinology, Metabolism and Nephrology, Kochi Medical School, Kochi University, Kochi, Japan
3. Department of Clinical and Molecular Endocrinology, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
4. Department of Endocrinology and Metabolism, Hirosaki University Graduate School of Medicine, Aomori, Japan