RT Journal Article SR Electronic T1 Even mild COVID-19 may have long-term brain impacts JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1360 OP E1361 DO 10.1503/cmaj.1095958 VO 193 IS 34 A1 Diana Duong YR 2021 UL http://www.cmaj.ca/content/193/34/E1360.abstract