A systematic review of potential long-term effects of sport-related concussion - Manley, G T; Gardner, A J; Schneider, K J; Guskiewicz, K M; Bailes, J; Cantu, R C; Castellani, R J; Turner, M; Jordan, B D; Randolph, C; Dvořák, J; Hayden, K A; Tator, C H; McCrory, P; Iverson, G L (Br J Sports Med, 2017)