1. Department of Internal Medicine Division of Endocrinology, Metabolism and Nephrology Keio University School of Medicine Tokyo Japan
2. Hiratsuka City Hospital Kanagawa Japan
3. Suruga Clinic Shizuoka Japan
4. Kawasaki Municipal Ida Hospital Kanagawa Japan
5. Tokyo Dental College Ichikawa General Hospital Chiba Japan
6. Tokui Clinic Kanagawa Japan
7. Yokohama Municipal Citizen's Hospital Kanagawa Japan
8. Department of Internal Medicine Division of Gastroenterology and Hepatology Keio University School of Medicine Tokyo Japan