Please note that the authors of Gilbertet al (Role ofUreaplasma urealyticum in lung disease of prematurity: 1999;81:F162-7) have noted a discrepancy in the reference list for this article. Reference 2 should read: 2 Todd DA, Jane A, John E. Chronic oxygen dependency in infants born at 24-32 weeks' gestation: the role of antenatal and neonatal factors.J Paediatr Child Health1997:33:402-7. From there on all references should be renumbered accordingly.