title: Regionalized perinatal care systems and very low-birth-weight and very preterm infants.
authors.forename: Lex W
authors.initials: LW
authors.lastname: Doyle
mesh_terms: D001724:Birth Weight; D006782:Hospitals, Special / Q000706:statistics & numerical data*; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D007231:Infant, Newborn; D007234:Infant, Premature; D015201:Meta-Analysis as Topic; D047928:Premature Birth; D011788:Quality of Life; D016019:Survival Analysis