RT Journal Article SR Electronic T1 Clinical practice guidelines as marketing tools JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP cmaj.109-3781 DO 10.1503/cmaj.109-3781 A1 Collier, Roger YR 2010 UL http://www.cmaj.ca/content/early/2011/01/10/cmaj.109-3781.abstract AB