WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 9,2007, Pages 1451-1452,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 9,2007, Pages 1438-1444,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 9,2007, Pages 1435-1437,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 9,2007, Pages 1399-1407,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 9,2007, Pages 1360-1364,