RT Journal Article SR Electronic T1 Vaping risks for youth continue to emerge JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1113 OP E1114 DO 10.1503/cmaj.1095807 VO 191 IS 40 A1 Marie-Claude Grégoire YR 2019 UL http://www.cmaj.ca/content/191/40/E1113.abstract