Affiliation: | Hiroshi Okamoto, Takashi Kamei, Department of Gastroenterological Surgery, Graduate School of Medicine, Tohoku University, Sendai 980-8574, JapanHiroshi Kikuchi, Department of Surgery, South Miyagi Medical Center, Miyagi 989-1253, JapanHiroshi Naganuma, Department of Pathology, Sendai City Hospital, Sendai 982-8502, Japan |