Erratum: F ifty Y ears   of R esearch   in ARDS. Setting Positive End-Expiratory Pressure in Acute Respiratory Distress Syndrome

Definition of abbreviations: CI = confidence interval; HR = hazard ratio; N/A = not applicable: HR could not be calculated because the assessment was made only at 6 yr of age; OR = odds ratio.Treatment effects adjusted for gestational age, smokers in the home, and a family history of allergy.