%0 Journal Article %A Martin Raftery %A Simon Kemp %A Jon Patricios %A Michael Makdissi %A Philippe Decq %T It is time to give concussion an operational definition: a 3-step process to diagnose (or rule out) concussion within 48 h of injury: World Rugby guideline %D 2016 %R 10.1136/bjsports-2016-095959 %J British Journal of Sports Medicine %P 642-643 %V 50 %N 11 %U https://bjsm.bmj.com/content/bjsports/50/11/642.full.pdf