1. Department of Gastroenterology and Metabology; Ehime University Graduate School of Medicine; Toon Japan
2. Center for Liver-Biliary-Pancreatic Diseases; Matsuyama Red Cross Hospital; Matsuyama Japan
3. Department of Gastroenterology; Ehime Prefectural Central Hospital; Matsuyama Japan
4. Department of Gastroenterology; Saiseikai Imabari Hospital; Imabari Japan
5. Department of Gastroenterology; Matsuyama Shimin Hospital; Matsuyama Japan
6. Department of Internal Medicine; Saiseikai Matsuyama Hospital; Matsuyama Japan
7. Department of Gastroenterology; Uwajima City Hospital; Uwajima Japan
8. Department of Gastroenterology; Ehime Prefectural Imabari Hospital; Imabari Japan
9. Department of Gastroenterology; National Hospital Organization Ehime Medical Center; Toon Japan