RT Journal Article SR Electronic T1 Thumb and vallecula signs in acute infectious epiglottitis JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1289 OP E1289 DO 10.1503/cmaj.170194 VO 189 IS 41 A1 Matsuura, Hiroki A1 Fukumura, Takashi YR 2017 UL http://www.cmaj.ca/content/189/41/E1289.abstract AB