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WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 24,2008, Pages 3855-3860, doi:10.3748/wjg.14.3855
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 24,2008, Pages 3781-3791, doi:10.3748/wjg.14.3781
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 24,2008, Pages 3841-3848, doi:10.3748/wjg.14.3841