RT Journal Article SR Electronic T1 Cardiac herniation after blunt thoracic trauma JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E454 OP E454 DO 10.1503/cmaj.191446 VO 192 IS 17 A1 Jonathon Broughton A1 Duncan Maguire A1 Nicholas LeBlanc YR 2020 UL http://www.cmaj.ca/content/192/17/E454.abstract