TY - JOUR T1 - Physicians combat opioid crisis JF - Canadian Medical Association Journal JO - CMAJ SP - E44 LP - E45 DO - 10.1503/cmaj.109-5361 VL - 189 IS - 1 AU - Barbara Sibbald Y1 - 2017/01/09 UR - http://www.cmaj.ca/content/189/1/E44.abstract ER -