RT Journal Article SR Electronic T1 Health minister ends special access to prescription heroin JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP cmaj.109-4626 DO 10.1503/cmaj.109-4626 A1 Eggertson, Laura YR 2013 UL http://www.cmaj.ca/content/early/2013/10/15/cmaj.109-4626.abstract AB