RT Journal Article SR Electronic T1 Impaired driving and legalization of recreational cannabis JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E481 OP E485 DO 10.1503/cmaj.191032 VO 193 IS 14 A1 Windle, Sarah B. A1 Sequeira, Crystal A1 Filion, Kristian B. A1 Thombs, Brett D. A1 Reynier, Pauline A1 Grad, Roland A1 Ells, Carolyn A1 Eisenberg, Mark J. YR 2021 UL http://www.cmaj.ca/content/193/14/E481.abstract