WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 15,2004, Pages 2295-2298,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 15,2004, Pages 2305-2306,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 15,2004, Pages 2157-2162,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 15,2004, Pages 2278-2280,