1. Second Department of Internal Medicine, Division of Endocrinology, Diabetes and Metabolism, Hematology, Rheumatology, Graduate School of Medicine, University of the Ryukyus
2. Okinawa Hokubu Hosipital
3. Department of Internal Medicine (Diabetes & Endocrinology), Matsuyama Shimin Hospital
4. Department of Endocrinology and Diabetes Mellitus, School of Medicine, Fukuoka University
5. Tanaka Clinic
6. Department of Internal Medicine 1, Shimane University Faculty of Medicine