RT Journal Article SR Electronic T1 Who should wear a face mask? Experts weigh in on Canada’s COVID-19 response JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E440 OP E441 DO 10.1503/cmaj.1095863 VO 192 IS 16 A1 Lauren Vogel YR 2020 UL http://www.cmaj.ca/content/192/16/E440.abstract AB