RT Journal Article SR Electronic T1 Towards more accurate assessment of preterm systemic blood flow 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 F2 OP F3 DO 10.1136/archdischild-2016-311129 VO 102 IS 1 A1 Nick Evans YR 2017 UL http://fn.bmj.com/content/102/1/F2.abstract AB