RT Journal Article SR Electronic T1 Diagnostic ultrasound in the athlete's locomotor system. 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 31 OP 39 DO 10.1136/bjsm.24.1.31 VO 24 IS 1 A1 H Mellerowicz A1 E Stelling A1 A Kefenbaum YR 1990 UL http://bjsm.bmj.com/content/24/1/31.abstract AB