RT Journal Article SR Electronic T1 Colorectal cancer screening JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 731 OP 731-a DO 10.1503/cmaj.1070176 VO 178 IS 6 A1 Barkun, Alan A1 Flegel, Ken YR 2008 UL http://www.cmaj.ca/content/178/6/731.2.abstract