^○Kazuomi Ueshima (Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka-Sayama, Osaka, Japan)

^○Toshihiro Tanaka, Hideyuki Nishiofuku, Takeshi Sato, Tetsuya Masada, Shota Tatsumoto, Kimihiko Kichikawa (Dept. of Radiology, IVR Center)