WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 23,2008, Pages 3750-3753, doi:10.3748/wjg.14.3750
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WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 23,2008, Pages 3672-3680, doi:10.3748/wjg.14.3672
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 23,2008, Pages 3710-3718, doi:10.3748/wjg.14.3710