RT Journal Article SR Electronic T1 Virtual colonoscopy performed poorly in detecting colorectal neoplasia JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 122 OP 122 DO 10.1136/ebm.9.4.122 VO 9 IS 4 YR 2004 UL http://ebm.bmj.com/content/9/4/122.abstract AB