RT Journal Article SR Electronic T1 Widened mediastinum in a child with severe trauma JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1181 OP 1182 DO 10.1503/cmaj.070936 VO 177 IS 10 A1 Ilan Buffo-Sequeira MD A1 Douglas D. Fraser, MD PhD YR 2007 UL http://www.cmaj.ca/content/177/10/1181.abstract