1. Gastroenterology Center; Ehime Prefectural Central Hospital; Matsuyama Japan
2. Department of Gastroenterology and Hepatology; Ogaki Municipal Hospital; Gifu Japan
3. Department of Gastroenterology; Okayama City Hospital; Okayama Japan
4. Department of Hepatology; Kagawa Prefectural Central Hospital; Takamatsu Japan
5. Division of Gastroenterology and Hepatology, Department of Internal Medicine; Nippon Medical School; Tokyo Japan
6. Department of Gastroenterology; Asahi General Hospital; Asahi Japan
7. Center of Gastroenterology; Teine Keijinkai Hospital; Sapporo Japan
8. Department of Gastroenterology; Toyama University Hospital; Toyama Japan
9. Department of Gastroenterology and Metabology; Ehime University Graduate School of Medicine; Toon Japan
10. Division of Gastroenterology and Hepatology; Otakanomori Hospital; Kashiwa Japan
11. Department of Gastroenterology; Tokushima Prefectural Central Hospital; Tokushima Japan
12. Department of Gastroenterology; Saiseikai Niigata Daini Hospital; Niigata Japan
13. Hepato-biliary Center; Matsuyama Red Cross Hospital; Matsuyama Japan