RT Journal Article SR Electronic T1 New CMAJ policy on competing interests in guidelines JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E350 OP E351 DO 10.1503/cmaj.190316 VO 191 IS 13 A1 Diane Kelsall YR 2019 UL http://www.cmaj.ca/content/191/13/E350.abstract