Chae H S, Kim S S, Han S W, Lee C D, Choi K Y, Chung I S, Sun H S, An C H
Department of Internal Medicine and Surgery, Catholic University, College of Medicine, Seoul, South Korea.
Gastrointest Endosc. 2001 Aug;54(2):264-6. doi: 10.1067/mge.2001.116326.