P461 Influence of melatonin on the course of ulcerative colitis

P459 Impact of inflammatory bowel disease on patients’ daily life: An online Korean Association for the Study of Intestinal Disease (KASID) survey Y.S. Kim1 *, S.A. Jung2, K.M. Lee3, S.J. Park4, T.O. Kim5, C.-H. Choi6, H.G. Kim7, W. Moon8, C.M. Moon9, H.K. Song2, S.-Y. Na10, S.-K. Yang11. 1Seoul National University Hospital Healthcare System Gangnam center, Internal Medicine, Seoul, Korea, Republic of, 2Ewha University school of Medicine, Internal Medicine, Seoul, Korea, Republic of, 3The Catholic University College of Medicine, Internal Medicine, Seoul, Korea, Republic of, 4Yonsei University College of Medicine, Internal Medicine, Seoul, Korea, Republic of, 5Haeundae Paik Hospital, Inje University College of Medicine, Internal Medicine, Seoul, Korea, Republic of, 6Chung-Ang University College of Medicine, Internal Medicine, Seoul, Korea, Republic of, 7Soonchunhyang University College of Medicine, Internal Medicine, Seoul, Korea, Republic of, 8Kosin University College of Medicine, Internal Medicine, Seoul, Korea, Republic of, 9Kangbuk Samsung Hospital, Sungkyunkwan University College of Medicine, Internal Medicine, Seoul, Korea, Republic of, 10Jeju National University School of Medicine, Internal Medicine, Seoul, Korea, Republic of, 11Ulsan University College of Medicine, Internal Medicine, Seoul, Korea, Republic of