PT - JOURNAL ARTICLE AU - Lars Engebretsen AU - Kathrin Steffen TI - To PRP or not? AID - 10.1136/bjsm.2010.080390 DP - 2010 Dec 01 TA - British Journal of Sports Medicine PG - 1071--1071 VI - 44 IP - 15 4099 - http://bjsm.bmj.com/content/44/15/1071.short 4100 - http://bjsm.bmj.com/content/44/15/1071.full SO - Br J Sports Med2010 Dec 01; 44