Corrections
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P J McNamara and A Sehgal. Towards rational management of the patent ductus arteriosus: the need for disease staging (*Arch Dis Child Fetal Neonatal Ed* 2007;**92**:F424–F427). In class E3 of table 1 IVRT should read 40–50 (not 50–60) and IVRT of class E4 should read <40 (not >60).