RT Journal Article SR Electronic T1 The challenges of interventional trials in fetal therapy 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 F448 OP F450 DO 10.1136/archdischild-2013-305624 VO 99 IS 6 A1 Morris, R Katie A1 Daniels, J A1 Deeks, J A1 Field, D A1 Kilby, M D YR 2014 UL http://fn.bmj.com/content/99/6/F448.abstract AB