RT Journal Article SR Electronic T1 Diagnosing concussion JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1601 OP 1601 DO 10.1503/cmaj.113-2149 VO 185 IS 18 A1 Craton, Neil A1 Leslie, Oliver YR 2013 UL http://www.cmaj.ca/content/185/18/1601.1.abstract