RT Journal Article SR Electronic T1 The problem knee. Diagnosis and treatment in the younger patient 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 190 OP 190 DO 10.1136/bjsm.20.4.190-a VO 20 IS 4 A1 Muckle, D. S. YR 1986 UL http://bjsm.bmj.com/content/20/4/190.2.abstract AB