Hong Sung Pil, Park Seung Woo, Lee Se Jun, Chung Jun Pyo, Song Si Young, Chung Jae Bock, Kang Jin Kyung, Cho Nam Hoon
Yonsei University College of Medicine, Department of Internal Medicine, Seoul, Korea.
Gastrointest Endosc. 2002 Nov;56(5):756-60. doi: 10.1067/mge.2002.129083.