RT Journal Article SR Electronic T1 British Paediatric Association JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 415 OP 421 DO 10.1136/adc.38.200.415 VO 38 IS 200 YR 1963 UL http://adc.bmj.com/content/38/200/415.abstract AB