The SAIL trial aims to provide evidence for changing policy or standard of care. The context of this trial is an unacceptable rate of poor long-term outcomes of preterm infants born as Extremely Low Gestational Age Newborns (ELGAN) <1000 g birthweight (BW), but especially for those born between 23-26 weeks' gestational age (GA). Such infants are the most vulnerable and immature in all organ systems, including the lungs and the brain. These infants are at high risk of death and bronchopulmonary dysplasia (BPD) during their initial hospitalization, neurodevelopmental impairment (NDI) and pulmonary problems in infancy and childhood.