RT Journal Article SR Electronic T1 The practicality of practice guidelines JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1295 OP E1296 DO 10.1503/cmaj.109-4048 VO 183 IS 18 A1 Lauren Vogel YR 2011 UL http://www.cmaj.ca/content/183/18/E1295.abstract