RT Journal Article SR Electronic T1 Marijuana strains doctor–patient relationship JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E511 OP E512 DO 10.1503/cmaj.109-4879 VO 186 IS 14 A1 Laura Eggertson YR 2014 UL http://www.cmaj.ca/content/186/14/E511.abstract AB