RT Journal Article SR Electronic JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 514 OP 514 DO 10.1136/adc.85.6.514 VO 85 IS 6 YR 2001 UL http://adc.bmj.com/content/85/6/514.abstract AB