Your browser does not support a redirect please cut/paste this URL: http://www.quintpub.com/journals/wjo/abstract.php?iss2_id=363&article_id=4492&article=6&title=Prospective
or Click Here http://www.quintpub.com/journals/wjo/abstract.php?iss2_id=363&article_id=4492&article=6&title=Prospective to try and access this link