WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 1,2008, Pages 70-75, doi:10.3748/wjg.14.70
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 1,2008, Pages 90-94, doi:10.3748/wjg.14.90
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 1,2008, Pages 81-84, doi:10.3748/wjg.14.81
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 1,2008, Pages 95-100, doi:10.3748/wjg.14.95
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 1,2008, Pages 101-107, doi:10.3748/wjg.14.101