Shimizu Yuichi, Yoshida Takeshi, Takahashi Masakazu, Ono Shouko, Mabe Katsuhiro, Kato Mototsugu, Fujita Tomonori, Asaka Masahiro
Third Department of Internal Medicine, Hokkaido University Hospital, Sapporo, Japan.
Gastrointest Endosc. 2012 May;75(5):1108-10. doi: 10.1016/j.gie.2011.05.041. Epub 2011 Aug 11.