1. Department of Gastroenterology and Hepatology Faculty of Medicine Kindai University OsakaJapan
2. Second Department of Internal Medicine Wakayama Medical University School of Medicine WakayamaJapan
3. First Department of Internal Medicine Faculty of Medicine University of Yamanashi YamanashiJapan
4. Division of Biostatistics Clinical Research Center Faculty of Medicine Kindai UniversityOsakaJapan
5. Department of Gastroenterology and Hepatology Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama University OkayamaJapan
6. Division of Gastroenterology Department of Internal Medicine Kobe University Graduate School of Medicine HyogoJapan
7. Gastroenterological Center Yokohama City University Medical Center KanagawaJapan
8. Division of Gastroenterology Tohoku University Graduate School of Medicine MiyagiJapan
9. Department of Medicine Division of Gastroenterology Jichi Medical University Tochigi Japan
10. Department of Cancer Survey and Gastrointestinal Oncology Osaka International Cancer Institute OsakaJapan
11. Department of Gastroenterology Kishiwada Tokushukai Hospital OsakaJapan
12. Department of Internal Medicine Saiseikai Matsusaka Hospital MieJapan