WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 31,2007, Pages 4249-4254,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 31,2007, Pages 4219-4223,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 31,2007, Pages 4284-4286,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 31,2007, Pages 4224-4229,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 31,2007, Pages 4168-4176,