RT Journal Article SR Electronic T1 Ludwig angina JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E246 OP E246 DO 10.1503/cmaj.160279 VO 189 IS 6 A1 Marina Kobayashi A1 Kenta Watanabe YR 2017 UL http://www.cmaj.ca/content/189/6/E246.abstract AB