WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 45,2008, Pages 7012-7015, doi:10.3748/wjg. 14.7012
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 45,2008, Pages 6929-6935, doi:10.3748/wig. 14.6929
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 45,2008, Pages 6943-6947, doi:10.3748/wjg. 14.6943
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 45,2008, Pages 6975-6980, doi:10.3748/wjg. 14.6975
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 14, Issue 45,2008, Pages 7018-7019,