RT Journal Article SR Electronic T1 Orthopaedia JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 573 OP 573 DO 10.1136/adc.36.189.573 VO 36 IS 189 YR 1961 UL http://adc.bmj.com/content/36/189/573.1.abstract AB