PT - JOURNAL ARTICLE AU - Ekstrand, Jan TI - Keeping your top players on the pitch: the key to football medicine at a professional level AID - 10.1136/bjsports-2013-092771 DP - 2013 Aug 01 TA - British Journal of Sports Medicine PG - 723--724 VI - 47 IP - 12 4099 - http://bjsm.bmj.com/content/47/12/723.short 4100 - http://bjsm.bmj.com/content/47/12/723.full SO - Br J Sports Med2013 Aug 01; 47