RT Journal Article SR Electronic T1 Colonoscopy detected colon polyps better than air contrast barium enema or computed tomographic colonography JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 124 OP 124 DO 10.1136/ebm.10.4.124 VO 10 IS 4 YR 2005 UL http://ebm.bmj.com/content/10/4/124.abstract AB