1. 28-day survival rates of 6676 neonates with birth weights of 1250 g. or less;Phelps;Pediatrics,1991
2. Outcomes of extremely-low-birthweight infants between 1982–1988;Hack;N Engl J Med,1989
3. Mortality in very preterm and very low birth weight infants according to place of birth and level of care: Results of a national collaborative surveyof preterm and very low birth weight infants in the Netherlands;Verloove-Vanhorick;Pediatrics,1988
4. Outcomes of extremely low birth weight infants;Hack;Pediatrics,1996
5. Improved neonatal survival following multiple doses of bovine surfactant in very premature neonates at risk for respiratory distress syndrome;Hoekstra;Pediatrics,1991