| Affiliation: | 1. Division of Gastroenterology, Department of Internal Medicine, Soonchunhyang University College of Medicine, Cheonan Hospital, Cheonan, Republic of Korea;2. Division of Gastroenterology, Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea;3. Division of Gastroenterology, Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon Hospital, Bucheon, Republic of Korea;4. Division of Gastroenterology, Department of Internal Medicine, Inha University School of Medicine, Incheon, Republic of Korea;5. Clinical Trial Center, Soonchunhyang University College of Medicine, Cheonan Hospital, Cheonan, Republic of Korea |
