TY - JOUR T1 - New Canadian guidance on opioid use for chronic pain: necessary but not sufficient JF - Canadian Medical Association Journal JO - CMAJ SP - E650 LP - E651 DO - 10.1503/cmaj.170431 VL - 189 IS - 18 AU - Andrea D. Furlan AU - Owen D. Williamson Y1 - 2017/05/08 UR - http://www.cmaj.ca/content/189/18/E650.abstract ER -