RT Journal Article SR Electronic T1 Whirlpool sign on ultrasound imaging in a preterm infant with suspected malrotation volvulus 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 fetalneonatal-2020-320804 DO 10.1136/archdischild-2020-320804 A1 Hannah Watts A1 Rachael Harrison A1 Kate Graham-Evans YR 2020 UL http://fn.bmj.com/content/early/2020/12/08/archdischild-2020-320804.abstract AB