1. Department of Gastroenterology and Hepatology; Nagoya University Graduate School of Medicine; Nagoya Japan
2. Department of Endoscopy; Nagoya University Hospital; Nagoya Japan
3. Department of Gastroenterology; Ogaki Municipal Hospital; Ogaki Gifu Japan
4. Department of Gastroenterology; Public Nishichita General Hospital; Tokai Aichi Japan
5. Department of Gastroenterology; Konan Kousei Hospital; Konan Aichi Japan
6. Department of Gastroenterology; Daido Hospital; Nagoya Japan
7. Department of Gastroenterology; Aichi Cancer Centre Hospital; Nagoya Japan
8. Department of Gastroenterology and Hepatology; Fujita Health University; Toyoake Aichi Japan
9. Department of Gastroenterology; Toyohashi Municipal Hospital; Toyohashi Aichi Japan
10. Department of Gastroenterology; Komaki Municipal Hospital; Komaki Aichi Japan
11. Department of Gastroenterology; Japanese Red Cross Nagoya Daiichi Hospital; Nagoya Japan
12. Department of Gastroenterology; Handa City Hospital; Handa Aichi Japan