RT Journal Article SR Electronic T1 Cannabis legislation fails to protect Canada’s youth JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E737 OP E738 DO 10.1503/cmaj.170555 VO 189 IS 21 A1 Diane Kelsall YR 2017 UL http://www.cmaj.ca/content/189/21/E737.abstract