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Table 2 Inclusion/Exclusion criteria

From: Prematurity and respiratory outcomes program (PROP): study protocol of a prospective multicenter study of respiratory outcomes of preterm infants in the United States

  Inclusion criteria
- 23 0/7 to 28 6/7 weeks using best obstetrical estimate
- 7 days of age or less at enrollment
  Exclusion criteria
- Concern for viability
- Structurally significant congenital heart disease
- Structural abnormalities of the upper airway, lungs or chest wall
- Congenital malformations or syndromes that adversely affect life expectancy or cardio-pulmonary development
- Family unlikely to be available for long-term follow-up