Junko Takagi1, Hiroyuki Morita2, Koji Kimata3. 1. Division of Endocrinology and Metabolism, Department of Internal Medicine, Aichi Medical University School of Medicine, 1-1 Yazako Karimata, Nagakute, Aichi, 480-1195, Japan. 2. Division of Endocrinology and Metabolism, Department of Internal Medicine, Aichi Medical University School of Medicine, 1-1 Yazako Karimata, Nagakute, Aichi, 480-1195, Japan. moritahi@aichi-med-u.ac.jp. 3. Advanced Medical Research Center, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan.