RT Journal Article SR Electronic T1 Low vitamin A levels in preterm neonates receiving long-term parenteral vitamin A supplementation 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 F481 OP F481 DO 10.1136/archdischild-2016-310584 VO 101 IS 5 A1 H Ord A1 C Harper A1 F Pearson A1 L V Marino A1 A Saha A1 A Batra YR 2016 UL http://fn.bmj.com/content/101/5/F481.2.abstract AB