RT Journal Article SR Electronic T1 High-strength opioid formulations: the case for a ministerial recall JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1404 OP E1405 DO 10.1503/cmaj.181289 VO 190 IS 48 A1 Matthew Herder A1 David Juurlink YR 2018 UL http://www.cmaj.ca/content/190/48/E1404.abstract