RT Journal Article SR Electronic T1 Identifying concussion: when guidelines collide with real-world implementation—is a formal medical diagnosis necessary in every case once a proper protocol is implemented? 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 1358 OP 1359 DO 10.1136/bjsports-2016-096608 VO 50 IS 22 A1 Pierre Frémont YR 2016 UL http://bjsm.bmj.com/content/50/22/1358.abstract AB