RT Journal Article SR Electronic T1 Ontario health providers protest pause on overdose prevention JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1148 OP E1148 DO 10.1503/cmaj.109-5660 VO 190 IS 38 A1 Lauren Vogel YR 2018 UL http://www.cmaj.ca/content/190/38/E1148.abstract