WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 28,2007, Pages 3873-3877,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 28,2007, Pages 3864-3867,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 28,2007, Pages 3829-3835,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 28,2007, Pages 3895-3896,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 28,2007, Pages 3799-3805,