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Yoshito Tomimaru, Hidetoshi Eguchi, Shigeru Marubashi, Hiroshi Wada, Shogo Kobayashi, Masahiro Tanemura, Koji Umeshita, Yuichiro Doki, Masaki Mori, Hiroaki Nagano 
World J Gastroenterol 17(32):3709-3715. Published online Aug 28, 2011. doi: 10.3748/wjg.v17.i32.3709
Phunchai Charatcharoenwitthaya, Nonthalee Pausawasdi, Nuttiya Laosanguaneak, Jakkrapan Bubthamala, Tawesak Tanwandee, Somchai Leelakusolvong 
World J Gastroenterol 17(32):3724-3732. Published online Aug 28, 2011. doi: 10.3748/wjg.v17.i32.3724
Renato Costi, Cinzia Azzoni, Federico Marchesi, Lorena Bottarelli, Vincenzo Violi, Cesare Bordi 
World J Gastroenterol 17(32):3752-3758. Published online Aug 28, 2011. doi: 10.3748/wjg.v17.i32.3752
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