WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 23,2007, Pages 3215-3220,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 23,2007, Pages 3262-3264,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 23,2007, Pages 3206-3214,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 23,2007, Pages 3268-3270,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 23,2007, Pages 3271,