1. Department of Internal Medicine, Inha University Hospital, Incheon, Korea
2. Korea Association of Health Promotion, Jeonbuk Branch, Jeonju, Korea
3. National Center of Efficacy Evaluation for the Development of Health Products Targeting Digestive Disorders (NCEED), and Utah-Inha DDS & Advanced Therapeutics Research Center, Incheon,Korea
4. Digestive Disease Center and Research Institute, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
5. Division of Gastroenterology, Department of Internal Medicine, Chungbuk National University College of Medicine, Cheongju, Korea
6. Digestive Disease Center, CHA Bundang Medical Center, CHA University, Seongnam, Korea
7. Department of Internal Medicine, Soonchunhyang University Cheonan Hospital, Soonchunhyang University School of Medicine, Cheonan, Korea
8. Division of Gastroenterology, Department of Internal Medicine, Korea University Ansan Hospital, Korea University School of Medicine, Ansan Korea
9. Department of Gastroenterology, Ajou University School of Medicine, Suwon, Korea
10. Division of Gastroenterology, Department of Internal Medicine, Dongtan Sacred Heart Hospital, Hwaseong, Korea