TY - JOUR T1 - Corrigendum JF - British Journal of Sports Medicine JO - Br J Sports Med SP - 97 LP - 97 DO - 10.1136/bjsm.13.3.97 VL - 13 IS - 3 A2 - , Y1 - 1979/09/01 UR - http://bjsm.bmj.com/content/13/3/97.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -