WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 28,2009, Pages 3532-3537, doi:10.3748/wjg.15.3532
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 28,2009, Pages 3472-3479, doi:10.3748/wjg.15.3472
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 28,2009, Pages 3493-3497, doi:10.3748/wjg.15.3493
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 28,2009, Pages 3498-3503, doi:10.3748/wjg.15.3498
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 15, Issue 28,2009, Pages 3480-3485, doi:10.3748/wjg.15.3480