WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 47,2008, Pages 7256-7259, doi:10.3748/wjg.14.7256
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WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 47,2008, Pages 7220-7224, doi:10.3748/wjg.14.7220
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 47,2008, Pages 7235-7239, doi:10.3748/wjg.14.7235
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 47,2008, Pages 7225-7230, doi:10.3748/wjg.14.7225