Changing incidence of bronchopulmonary dysplasia.
D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000453:epidemiology*; D008171:Lung Diseases / Q000453:epidemiology*; D009519:New York City; D011175:Positive-Pressure Respiration / Q000009:adverse effects; D012127:Respiratory Distress Syndrome, Newborn / Q000150:complications / Q000628:therapy