RT Journal Article SR Electronic T1 Guidelines should be assessed based on the underlying evidence JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E871 OP E871 DO 10.1503/cmaj.72508 VO 191 IS 31 A1 Peter R. Carroll A1 J. Kellogg Parsons YR 2019 UL http://www.cmaj.ca/content/191/31/E871.abstract