WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 36,2007, Pages 4873-4880,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 36,2007, Pages 4839-4847,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 36,2007, Pages 4818-4823,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 36,2007, Pages 4914-4916,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 36,2007, Pages 4798-4806,