DOI: 10.1055/s-00000028

International Journal of Sports Medicine

References

Nordstrom A, Nordstrom P, Ekstrand J.
Sports-related concussion increases the risk of subsequent injury by about 50% in elite male football players.

Br J Sports Med 2014;
48: 1447-1450. doi:10.1136/bjsports-2013-093406

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