PT - JOURNAL ARTICLE ED - , TI - Correction DP - 2009 Apr 01 TA - British Journal of Sports Medicine PG - 310--311 VI - 43 IP - 4 4099 - http://bjsm.bmj.com/content/43/4/310.short 4100 - http://bjsm.bmj.com/content/43/4/310.full SO - Br J Sports Med2009 Apr 01; 43