RT Journal Article SR Electronic T1 Routinely collected data: the importance of high-quality diagnostic coding to research JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1054 OP E1055 DO 10.1503/cmaj.170807 VO 189 IS 33 A1 Stuart G. Nicholls A1 Sinéad M. Langan A1 Eric I. Benchimol YR 2017 UL http://www.cmaj.ca/content/189/33/E1054.abstract