TY - JOUR T1 - Opioid warning label JF - Canadian Medical Association Journal JO - CMAJ SP - E1318 LP - E1318 DO - 10.1503/cmaj.733320 VL - 189 IS - 42 AU - Melvin Herzog Y1 - 2017/10/23 UR - http://www.cmaj.ca/content/189/42/E1318.abstract N2 - ER -