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Shin NR, Lee JC, Lee HY, Kim MS, Whon TW, Lee MS, Bae JW.Shin NR, et al.Gut. 2014 May;63(5):727-35. doi: 10.1136/gutjnl-2012-303839. Epub 2013 Jun 26.Gut. 2014.PMID: 23804561