RT Journal Article SR Electronic T1 Professor G. M. Carstairs JF British Journal of Sports Medicine JO Br J Sports Med FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine SP 116 OP 116 DO 10.1136/bjsm.25.3.116 VO 25 IS 3 YR 1991 UL http://bjsm.bmj.com/content/25/3/116.abstract AB