TY - JOUR T1 - Opioid abuse JF - Canadian Medical Association Journal JO - CMAJ SP - 418 LP - 418 DO - 10.1503/cmaj.113-2108 VL - 185 IS - 5 AU - Joel Lexchin Y1 - 2013/03/19 UR - http://www.cmaj.ca/content/185/5/418.2.abstract N2 - ER -