RT Journal Article SR Electronic T1 Epidemiology of knee injuries: diagnosis and triage 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 227 OP 228 DO 10.1136/bjsm.34.3.227-a VO 34 IS 3 A1 Bollen, Steve YR 2000 UL http://bjsm.bmj.com/content/34/3/227.2.abstract AB