RT Journal Article SR Electronic T1 Cavernous sinus thrombosis related to sphenoid sinusitis in a child JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E737 OP E737 DO 10.1503/cmaj.201317 VO 193 IS 20 A1 Nobuhiko Ohashi A1 Akihiro Otsuka A1 Kanji Yamamoto YR 2021 UL http://www.cmaj.ca/content/193/20/E737.abstract