WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 26,2007, Pages 3631-3633,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 26,2007, Pages 3531-3539,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 26,2007, Pages 3592-3597,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 26,2007, Pages 3645-3648,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 26,2007, Pages 3634-3637,