PT - JOURNAL ARTICLE AU - Tomasz Kostka AU - Witold Furgal AU - Wojciech Gawroński AU - Andrzej Bugajski AU - Andrzej Czamara AU - Krzysztof Klukowski AU - Hubert Krysztofiak AU - Romuald Lewicki AU - Zbigniew Szyguła AU - Wiesław Tomaszewski AU - Tadeusz Trzaska AU - Jerzy Widuchowski AU - Andrzej Ziemba AU - Anna Jegier TI - Recommendations of the Polish Society of Sports Medicine on age criteria while qualifying children and youth for participation in various sports AID - 10.1136/bjsports-2011-090043 DP - 2012 Mar 01 TA - British Journal of Sports Medicine PG - 159--162 VI - 46 IP - 3 4099 - http://bjsm.bmj.com/content/46/3/159.short 4100 - http://bjsm.bmj.com/content/46/3/159.full SO - Br J Sports Med2012 Mar 01; 46