1. Division of Gastroenterology, Department of Internal Medicine, Incheon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
2. Department of Internal Medicine, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea
3. Division of Gastroenterology, Department of Internal Medicine, Chungnam National University School of Medicine, Daejeon, Korea
4. Department of Internal Medicine, Yonsei Institute of Gastroenterology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
5. HK inno.N Corp, Seoul, Korea