PT - JOURNAL ARTICLE ED - , TI - Discussion AID - 10.1136/bjsm.10.3.157 DP - 1976 Oct 01 TA - British Journal of Sports Medicine PG - 157--157 VI - 10 IP - 3 4099 - http://bjsm.bmj.com/content/10/3/157.short 4100 - http://bjsm.bmj.com/content/10/3/157.full SO - Br J Sports Med1976 Oct 01; 10