RT Journal Article SR Electronic T1 Hairy tongue JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E561 OP E561 DO 10.1503/cmaj.201559 VO 193 IS 16 A1 Eric Burge A1 Siddharth Kogilwaimath YR 2021 UL http://www.cmaj.ca/content/193/16/E561.abstract