WORLD JOURNAL OF GASTROENTEROLOGY, Volume 11, Issue 9,2005, Pages 1356-1360,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 11, Issue 9,2005, Pages 1361-1364,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 11, Issue 9,2005, Pages 1333-1338,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 11, Issue 9,2005, Pages 1369-1372,