Those in the "LMA" group will have an LMA inserted by routine technique, the cuff will be inflated, and the baby's respirations will be gently assisted with a flow-inflating anesthesia bag. When it is evident from physical examination and pulse oximetry that respiratory support is stable, the standard volume of Infasurf surfactant (3 mL/kg) will be injected in 2-4 aliquots into the proximal end of the LMA. Each aliquot will be followed by gentle positive-pressure assistance from the anesthesia bag until the surfactant has disappeared from the tube, and the infant will then be rotated to another position prior to the next aliquot. A minimum of both lateral positions will be used. After all aliquots have been administered, the LMA will be removed and the baby will be returned to nasal CPAP and managed by routine protocol. A baby in the LMA group may receive a subsequent LMA treatment if he/she requires a > 10 percentage-point increase in supplemental oxygen requirement for a > 30-minute period. Any subsequent dose cannot be given < 6 hours from a previous dose and a maximum of 3 total LMA doses may be given. No LMA surfactant may be administered under this protocol after 96 hours of age.