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Kazuya Okushin, Takeya Tsutsumi, Kazuhiko Ikeuchi, Akira Kado, Kenichiro Enooku, Hidetaka Fujinaga, Kyoji Moriya, Hiroshi Yotsuyanagi, Kazuhiko Koike 
World J Gastroenterol 24(32):3617-3625. Published online Aug 28, 2018. doi: 10.3748/wjg.v24.i32.3617
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