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 302 OP 302 DO 10.1136/adc.80.3.302 VO 80 IS 3 YR 1999 UL http://adc.bmj.com/content/80/3/302.abstract AB