1. Department of Internal Medicine, Wonkwang University College of Medicine, Iksan, Korea
2. Institute of Wonkwang Medical Science, Iksan, Korea
3. Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea
4. Department of Internal Medicine, University of Ulsan College of Medicine, Seoul, Korea
5. Department of Internal Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Korea
6. Department of Internal Medicine, Chungnam National University College of Medicine, Daejeon, Korea
7. Department of Internal Medicine, Soonchunhyang University School of Medicine, Bucheon, Korea
8. Department of Internal Medicine, Inje University Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Korea
9. Department of Internal Medicine, Inje University Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea
10. Department of Internal Medicine, Keimyung University Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea
11. Department of Internal Medicine, Kyungpook National University Chilgok Hospital, School of Medicine, Kyungpook National University, Daegu, Korea
12. Department of Internal Medicine, Inha University School of Medicine, Incheon, Korea
13. Department of Internal Medicine, Eunpyeong St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
14. Department of Internal Medicine, Uijeongbu Eulji Medical Center, Eulji University School of Medicine, Uijeongbu, Korea
15. Division of Gastroenterology, Department of Internal Medicine, Hallym University Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Hwaseong, Korea
16. National Evidence-based Healthcare Collaborating Agency, Seoul, Korea