RT Journal Article SR Electronic T1 Canada’s provinces and territories should disclose cannabis data to support research JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E341 OP E342 DO 10.1503/cmaj.202041 VO 193 IS 10 A1 Michael J. Armstrong YR 2021 UL http://www.cmaj.ca/content/193/10/E341.abstract