Collaborative randomised controlled trial of trigger versus conventional ventilation in preterm infants with respiratory distress syndrome

INTERVENTION: 1. Trigger ventilation 2. Conventional ventilation CONDITION: Neonatal diseases ; Neonatal Diseases ; Respiratory distress syndrome of newborn PRIMARY OUTCOME: 1. Death before discharge home or oxygen therapy at 36 weeks gestation; 2. Pneumothorax whilst ventilated; 3. Cerebral ultrasound abnormality nearest 6 weeks; 4. Duration of ventilation in survivors SECONDARY OUTCOME: Not provided at time of registration INCLUSION CRITERIA: Infants of less than 32 weeks gestation, they are ventilated within 72 hours of birth, and have features compatible with respiratory distress syndrome