Affiliation: | Chikako Shibata, Motoyuki Otsuka, Takahiro Kishikawa, Motoko Ohno, Takeshi Yoshikawa, Akemi Takata, Kazuhiko Koike, Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo 113-8655, JapanMotoyuki Otsuka, Japan Science and Technology Agency, PRESTO, Kawaguchi, Saitama 332-0012, Japan |