RT Journal Article SR Electronic 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 F0 OP F0 DO 10.1136/fn.85.3.F0 VO 85 IS 3 YR 2001 UL http://fn.bmj.com/content/85/3/F0.abstract AB