WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 39,2007, Pages 5208-5216,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 39,2007, Pages 5253-5260,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 39,2007, Pages 5232-5237,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 39,2007, Pages 5285-5287,