PT - JOURNAL ARTICLE AU - Lauren Vogel TI - Who should wear a face mask? Experts weigh in on Canada’s COVID-19 response AID - 10.1503/cmaj.1095863 DP - 2020 Apr 20 TA - Canadian Medical Association Journal PG - E440--E441 VI - 192 IP - 16 4099 - http://www.cmaj.ca/content/192/16/E440.short 4100 - http://www.cmaj.ca/content/192/16/E440.full SO - CMAJ2020 Apr 20; 192