RT Journal Article SR Electronic T1 Opioid prescriptions still rising but for smaller quantities JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1538 OP E1538 DO 10.1503/cmaj.109-5533 VO 189 IS 49 A1 Vogel, Lauren YR 2017 UL http://www.cmaj.ca/content/189/49/E1538.abstract AB