WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 14,2007, Pages 2113-2117,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 14,2007, Pages 2077-2082,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 14,2007, Pages 2072-2076,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 14,2007, Pages 2083-2088,