RT Journal Article SR Electronic T1 How work hours affect medical resident performance and wellness JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1086 OP E1087 DO 10.1503/cmaj.1095798 VO 191 IS 39 A1 Caroline Mercer YR 2019 UL http://www.cmaj.ca/content/191/39/E1086.abstract