RT Journal Article SR Electronic T1 Colorectal cancer screening JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 189 OP 189-a DO 10.1503/cmaj.1070155 VO 178 IS 2 A1 Ryan Zarychanski MD A1 Charles N. Bernstein MD YR 2008 UL http://www.cmaj.ca/content/178/2/189.2.abstract