PT - JOURNAL ARTICLE ED - , TI - David Patrick Chapman MCSP, SRP AID - 10.1136/bjsm.27.1.6 DP - 1993 Mar 01 TA - British Journal of Sports Medicine PG - 6--6 VI - 27 IP - 1 4099 - http://bjsm.bmj.com/content/27/1/6.short 4100 - http://bjsm.bmj.com/content/27/1/6.full SO - Br J Sports Med1993 Mar 01; 27