RT Journal Article SR Electronic T1 Correction JF Archives of Disease in Childhood - Fetal and Neonatal Edition JO Arch Dis Child Fetal Neonatal Ed FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP F252 OP F252 DO 10.1136/fn.80.3.F252e VO 80 IS 3 YR 1999 UL http://fn.bmj.com/content/80/3/F252.6.abstract AB