RT Journal Article SR Electronic T1 Public health experts are learning from Canada’s anti-mask protests JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1274 OP E1275 DO 10.1503/cmaj.1095901 VO 192 IS 42 A1 Sandani Hapuhennedige YR 2020 UL http://www.cmaj.ca/content/192/42/E1274.abstract