TY - JOUR T1 - Discussion JF - British Journal of Sports Medicine JO - Br J Sports Med SP - 45 LP - 45 DO - 10.1136/bjsm.8.1.45 VL - 8 IS - 1 A2 - , Y1 - 1974/04/01 UR - http://bjsm.bmj.com/content/8/1/45.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -