1. Department of Public Health, Ehime University Graduate School of Medicine, Toon 791-0295, Japan
2. Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Toon 791-0295, Japan
3. Department of Basic Research and Education, Ehime University Graduate School of Medicine, Toon 791-0295, Japan
4. Department of Internal Medicine, Matsuyama City Hospital, Matsuyama 790-0067, Japan
5. Department of Internal Medicine, Saiseikai Saijo Hospital, Saijo 793-0027, Japan
6. Department of Internal Medicine, Uwajima City Hospital, Uwajima 798-8510, Japan
7. Department of Internal Medicine, Yawatahama General City Hospital, Yawatahama 796-8502, Japan
8. Department of Internal Medicine, Ehime Niihama Hospital, Niihama 792-0042, Japan
9. Department of Internal Medicine, Saiseikai Matsuyama Hospital, Matsuyama 791-8026, Japan
10. Department of Lifestyle-related Medicine and Endocrinology, Ehime University Graduate School of Medicine, Toon 791-0295, Japan
11. Department of Internal Medicine, Saiseikai Imabari Hospital, Imabari 799-1592, Japan
12. Department of Public Health, Juntendo University Graduate School Medicine, Tokyo 113-8421, Japan