WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 26,2009, Pages 3303-3308, doi:10.3748/wjg.15.3303
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WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 26,2009, Pages 3210-3216, doi:10.3748/wjg.15.3210
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 26,2009, Pages 3232-3239, doi:10.3748/wjg.15.3232
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 26,2009, Pages 3269-3275, doi:10.3748/wjg.15.3269