RT Journal Article SR Electronic T1 Is computed tomographic colonography effective for colorectal cancer screening? JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1392 OP 1392 DO 10.1503/cmaj.1040500 VO 170 IS 9 A1 Linda Rabeneck YR 2004 UL http://www.cmaj.ca/content/170/9/1392.abstract