TY - JOUR T1 - Calendar JF - British Journal of Sports Medicine JO - Br J Sports Med SP - 70 LP - 70 DO - 10.1136/bjsm.24.1.70 VL - 24 IS - 1 A2 - , Y1 - 1990/03/01 UR - http://bjsm.bmj.com/content/24/1/70.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -