Consensus Statement on Concussion in Sport—The 4th International Conference on Concussion in Sport Held in Zurich, November 2012. Issue 4 (27th February 2013) - McCrory, Paul; Meeuwisse, Willem H.; Aubry, Mark; Cantu, Robert C.; Dvor̆ák, Jir̆í; Echemendia, Ruben J.; Engebretsen, Lars; Johnston, Karen M.; Kutcher, Jeffrey S.; Raftery, Martin; Sills, Allen; Benson, Brian W.; et al.