RT Journal Article SR Electronic T1 Towards rational management of the patent ductus arteriosus: the need for disease staging 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 F424 OP F427 DO 10.1136/adc.2007.118117 VO 92 IS 6 A1 Patrick J McNamara A1 Arvind Sehgal YR 2007 UL http://fn.bmj.com/content/92/6/F424.abstract AB