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WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 31,2008, Pages 4974-4976,
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WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 31,2008, Pages 4915-4922, doi:10.3748/wjg.14.4915
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 31,2008, Pages 4943-4948, doi:10.3748/wjg.14.4943