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Proportion of infants with respiratory resource utilization at each survey time point, 3, 6, 9 and 12 months corrected age, in late surfactant and control groups: A, Total resource utilization, B, Respiratory medication exposure, C, Home respiratory support, D, Hospitalization for respiratory cause, and E, Diuretic, F, Bronchodilator, G, Inhaled corticosteroid and H, Systemic steroid exposure.
