The impact of a tertiary perinatal center on survival of the very low birth weight infant.
D005260:Female; D006784:Hospitals, Teaching; D006785:Hospitals, University; D006801:Humans; D007226:Infant Mortality; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D007234:Infant, Premature; D007363:Intensive Care Units, Neonatal; D010500:Perinatology; D011247:Pregnancy; D011295:Prenatal Care; D013714:Tennessee