RT Journal Article SR Electronic T1 How physicians can “flex their advocacy muscles” JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1152 OP E1152 DO 10.1503/cmaj.1095479 VO 189 IS 36 A1 Roger Collier YR 2017 UL http://www.cmaj.ca/content/189/36/E1152.abstract