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
3 Sports Concussion South Africa, Johannesburg, South Africa Faculty of Health Sciences, The Section of Sports Medicine, University of Pretoria, Pretoria, South Africa Faculty of Health Sciences, The Department of Emergency Medicine, University of the Witwatersrand, Johannesburg, South Africa.
4 Florey Institute of Neuroscience and Mental Health, Austin Campus, Melbourne Brain Centre, Heidelberg, Australia Australian Centre for Research into Injury in Sport and its Prevention (ACRISP), Federation University, Ballarat, Australia.
5 Georges Charpak Human Biomecanics Institute, Arts et Métiers ParisTech René Diderot Paris 7 medical faculty Department of Neurosurgery, Assistance Publique Hôpitaux de Paris, Beaujon Hospital, Clichy, France French Rugby Federation Concussion Consultant.