RT Journal Article SR Electronic T1 Computed tomographic colonography without cathartic preparation performed well in detecting colorectal polyps JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 55 OP 55 DO 10.1136/ebm.10.2.55 VO 10 IS 2 YR 2005 UL http://ebm.bmj.com/content/10/2/55.abstract AB