RT Journal Article SR Electronic T1 Changes in illicit opioid use across Canada JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1385 OP 1385 DO 10.1503/cmaj.060729 VO 175 IS 11 A1 Fischer, Benedikt A1 Rehm, Jürgen A1 Patra, Jayadeep A1 Firestone Cruz, Michelle YR 2006 UL http://www.cmaj.ca/content/175/11/1385.abstract