Yamashita Kentaro, Yamazaki Kentaro, Ueno Atsumori, Arimura Yoshiaki, Endo Takao, Imai Kohzoh
First Department of Internal Medicine, Sapporo Medical University, Sapporo, Japan.
Gastroenterology. 2005 Nov;129(5):1374, 1809. doi: 10.1053/j.gastro.2005.01.062.