1. First Department of Internal Medicine School of Medicine, University of Occupational and Environmental Health, Japan Kitakyushu Japan
2. Department of Metabolism & Endocrinology Juntendo University Graduate School of Medicine Tokyo Japan
3. Department of Metabolic Medicine Osaka University Graduate School of Medicine Osaka Japan
4. Department of Metabolism and Atherosclerosis Osaka University Graduate School of Medicine Osaka Japan
5. Department of Medicine, Diabetology & Endocrinology Juntendo Tokyo Koto Geriatric Medical Center Tokyo Japan
6. Department of Internal Medicine Ashiya Central Hospital Ongagun Fukuoka Japan
7. Nishida Keiko Diabetes Clinic Kitakyushu Japan
8. Department of Internal Medicine, Division of Diabetes, Metabolism and Endocrinology Japan Labour Health and Safety Organization Kyushu Rosai Hospital, Moji Medical Center Kitakyushu Japan
9. Department of Biostatistics, Faculty of Medicine University of Tsukuba Tsukuba Ibaraki Japan