1. Department of Gastroenterology, Saiseikai Kanazawa Hospital, Kanazawa, Ishikawa, Japan
2. Department of Endoscopy, Kanazawa University Hospital, 13-1 Takaramachi, Kanazawa, Ishikawa 921-8641, Japan
3. Department of Gastroenterology, National Hospital Organization Kanazawa Medical Center, Kanazawa, Ishikawa, Japan
4. Department of Gastroenterology, Public Central Hospital of Matto Ishikawa, Hakusan, Ishikawa, Japan
5. Department of Gastroenterology, Kanazawa Red Cross Hospital, Kanazawa, Ishikawa, Japan
6. Department of Gastroenterology, Fukui Prefectural Hospital, Fukui, Fukui, Japan
7. Department of Gastroenterology, Hakui General Hospital, Hakui, Ishikawa, Japan
8. Department of Gastroenterology, Toyama Prefectural Central Hospital, Toyama, Toyama, Japan
9. Department of Gastroenterology, Tonami General Hospital, Tonami, Toyama, Japan
10. Department of Gastroenterology, Kanazawa Municipal Hospital, Kanazawa, Ishikawa, Japan
11. Department of Gastroenterology, Keiju Medical Center, Nanao, Ishikawa, Japan
12. Department of Gastroenterology, Ishikawa Prefectural Central Hospital, Kanazawa, Ishikawa, Japan
13. Department of Gastroenterology, Toyama City Hospital, Toyama, Toyama, Japan
14. Department of Gastroenterology, Komatsu Municipal Hospital, Komatsu, Ishikawa, Japan
15. Department of Gastroenterology, Komatsu Sophia Hospital, Komatsu, Ishikawa, Japan
16. Department of Gastroenterology, Kanazawa University Hospital, Kanazawa, Ishikawa, Japan