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Flow diagram of patient distribution and outcomes.
Sixty-two infants died before entering the study: 37 from severe intracranial hemorrhage and redirection of care, 10 from severe respiratory distress syndrome, 8 from severe pulmonary hemorrhage, 5 from bacteremia, and 2 from necrotizing enterocolitis.
BPD (n=393): not all study infants lived long enough to complete the room air challenge test at 36 weeks.
