RT Journal Article SR Electronic T1 The blue accessory digit 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 55 OP 55 DO 10.1136/archdischild-2015-308940 VO 101 IS 1 A1 Maria Ann Mannion A1 Brendan Fitzgerald A1 Peter Filan YR 2016 UL http://fn.bmj.com/content/101/1/55.abstract AB