WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 33,2007, Pages 4473-4479,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 33,2007, Pages 4437-4444,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 33,2007, Pages 4417-4422,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 33,2007, Pages 4514-4516,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 33,2007, Pages 4423-4430,