WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 25,2007, Pages 3405-3408,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 25,2007, Pages 3493-3499,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 25,2007, Pages 3523-3525,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 25,2007, Pages 3446-3455,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 25,2007, Pages 3438-3445,