Choi Joon-Hyuk, Lee Sung-Koo
Department of Internal Medicine, Division of Gastroenterology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Zip code: 138-736, Korea.
Saudi J Gastroenterol. 2014 Mar-Apr;20(2):79-80. doi: 10.4103/1319-3767.129472.