C Booth, M H Premkumar, A Yannoulis, et al. Sustainable use of continuous positive airway pressure in extremely preterm infants during the first week after delivery (Arch Dis Child Fetal Neonatal Ed 2006;91:F398–F402). In table 3 of this article CMV is incorrectly defined as cytomegalovirus; the correct definition is continuous mandatory ventilation.