RT Journal Article SR Electronic T1 Geographic tongue JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1424 OP E1424 DO 10.1503/cmaj.202855 VO 193 IS 36 A1 Prasanth, Venkata Joga A1 Singh, Anup YR 2021 UL http://www.cmaj.ca/content/193/36/E1424.abstract