RT Journal Article SR Electronic T1 With commentary JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 900 OP 900 DO 10.1136/adc.58.11.900 VO 58 IS 11 A1 Rylance, G YR 1983 UL http://adc.bmj.com/content/58/11/900.abstract AB