WORLD JOURNAL OF GASTROENTEROLOGY, Volume 12, Issue 28,2006, Pages 4473-4477,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 12, Issue 28,2006, Pages 4588-4592,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 12, Issue 28,2006, Pages 4569-4571,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 12, Issue 28,2006, Pages 4452-4460,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 12, Issue 28,2006, Pages 4549-4552,