RT Journal Article SR Electronic T1 Happy Birthday Concussion! JF British Journal of Sports Medicine JO Br J Sports Med FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine SP 203 OP 203 DO 10.1136/bjsports-2018-100316 VO 53 IS 4 A1 Michael Turner YR 2019 UL http://bjsm.bmj.com/content/53/4/203.abstract AB