RT Journal Article SR Electronic T1 Sledging injuries in the fens: an unlikely epidemic? 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 129 OP 130 DO 10.1136/bjsm.25.3.129 VO 25 IS 3 A1 P G Chapman A1 B Cohen A1 D J Shewring YR 1991 UL http://bjsm.bmj.com/content/25/3/129.abstract AB