The Catholic University of Korea Yeouido Saint Mary's Hospital, Seoul, Korea, Republic of
Seoul Asan Medical Center, Seoul, Korea, Republic of
Seoul Asan medical Center, Seoul, Korea, Republic of
Seoul National University Hospital, Seoul, Korea, Republic of
Chonnam National University Hospital, Gwangju, Korea, Republic of
Kangbuk Samsung Hospital, Seoul, Korea, Republic of
Korea University Guro Hospital, Seoul, Korea, Republic of
KASID IBD Research Group, Seoul, Korea, Republic of