RT Journal Article SR Electronic T1 E-cigarettes JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1136 OP E1136 DO 10.1503/cmaj.190552 VO 191 IS 41 A1 Aloosh, Mehdi A1 Johnston, Janice A1 Harvey, Bart YR 2019 UL http://www.cmaj.ca/content/191/41/E1136.abstract