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Newborn Infant
Infants
Premature Infant
Risk Factors
Low Birth Weight Infant
Treatment Outcome
Prospective Studies
Retrospective Studies
Bronchopulmonary Dysplasia
Infant, Premature, Diseases
Very Low Birth Weight Infant
Lung Diseases
Newborn Respiratory Distress Syndrome
Patent Ductus Arteriosus
Gestational Age
Pregnancy
Intensive Care Units, Neonatal
Pulmonary Surfactants
Artificial Respiration
North Carolina
Co-Publications
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