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Kazuo Hara, Kenji Yamao, Nobumasa Mizuno, Susumu Hijioka, Hiroshi Imaoka, Masahiro Tajika, Tutomu Tanaka, Makoto Ishihara, Nozomi Okuno, Nobuhiro Hieda, Tukasa Yoshida, Yasumasa Niwa 
World J Gastroenterol 22(3):1297-1303. Published online Jan 21, 2016. doi: 10.3748/wjg.v22.i3.1297
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