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 F79 OP F79 DO 10.1136/fn.81.1.F79a VO 81 IS 1 YR 1999 UL http://fn.bmj.com/content/81/1/F79.2.abstract AB