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McCrory, P; Meeuwisse, W; Johnston, K; Dvorak, J; Aubry, M; Molloy, M; Cantu, R (June 2009). "Consensus statement on concussion in sport – the Third International Conference on Concussion in Sport held in Zurich, November 2008". The Physician and Sportsmedicine. 37 (2): 141–59. doi:10.3810/psm.2009.06.1721. PMID20048521. S2CID42974527.