1. Division of Metabolism and Endocrinology; Department of Internal Medicine; Yokohama Sakae Kyosai Hospital; Federation of National Public Service Personnel Mutual Associations Yokohama; Yokohama Japan
2. Department of Endocrinology and Metabolism; Graduate School of Medicine; Yokohama City University; Yokohama Japan
3. Department of Psychology; Yokohama Sakae Kyosai Hospital; Federation of National Public Service Personnel Mutual Associations Yokohama; Yokohama Japan