76. St John EB, Nelson KG, Cliver SP, Bishnoi RR, Goldenberg RL. Cost of neonatal care according to gestational age at birth and survival status. American Journal of Obstetrics & Gynecology 2000;182(1):170–175.
77. Tommiska V, Tuominen R, Fellman V. Economic costs of care in extremely low birthweight infants during the first 2 years of life. Pediatric Critical Care Medicine 2003;4(2):256–257.
78. Doyle LW, Victorian Infant Collaborative Study Group. Evaluation of neonatal intensive care for extremely low birth weight infants in Victoria over two decades. II. Efficiency. Pediatrics 2004;113(3):510–514.
79. Doyle LW, Victorian Infant Collaborative Study Group. Evaluation of neonatal intensive care for extremely low birth weight infants in Victoria over two decades. I. Effectiveness. Pediatrics 2004;113(3):505–509.
80. Tyson JE, Younes N, Verter J, Wright LL. Viability, morbidity, and resource use among newborns of 501- to 800-g birth weight. National Institute of Child Health and Human Development Neonatal Research Network. JAMA 1996;276(20):1645–1651.
81. Lorenz JM, Paneth N, Jetton JR, den Ouden L, Tyson JE. Comparison of management strategies for extreme prematurity in New Jersey and the Netherlands: outcomes and resource expenditure. Pediatrics 2001;108(6):1269–1274.
82. Petrou S, Mehta Z, Hockley C, Cook-Mozaffari P, Henderson J, Goldacre M. The impact of preterm birth on hospital inpatient admissions and costs during the first 5 years of life. Pediatrics 2003;112(6):1290–1297.
83. Petrou S, Sach T, Davidson L. The long-term costs of preterm birth and low birth weight: results of a systematic review. Child: Care, Health, and Development 2001;27(2): 97–115.
84. McCormick MC, Richardson DK. Access to neonatal intensive care. The Future of Children 1995;5(1):162–175.
85. Menard MK, Liu Q, Holgren EA, Sappenfield WM. Neonatal mortality for very low birth weight deliveries in South Carolina by level of hospital perinatal service. American Journal of Obstetrics & Gynecology 1998;179(2):374–381.
86. Samuelson JL, Buehler JW, Norris D, Sadek R. Maternal characteristics associated with place of delivery and neonatal mortality rates among very-low-birthweight infants, Geor-gia. Paediatric and Perinatal Epidemiology 2002;16:305–313.
87. Johansson S, Montgomery SM, Ekbom A, et al. Preterm delivery, level of care, and infant death in Sweden: a population-based study. Pediatrics 2004;113(5):1230–1235.
88. Loh M, Osborn DA, Lui K, group NSW Neonatal Intensive Care Unit Study Group. Outcome of very premature infants with necrotising enterocolitis cared for in centres with or without on site surgical facilities. Archives of Disease in Childhood: Fetal and Neonatal Edition 2001;85:F114–F118.
89. Larson EH, Hart LG, Rosenblatt RA. Is non-metropolitan residence a risk factor for poor birth outcome in the U.S.? Social Science and Medicine 1997;45(2):171–188.
90. Ananth CV, Joseph KS, Oyelese Y, Demissie K, Vintzileos AM. Trends in preterm birth and perinatal mortality among singletons: United States, 1989 through 2000. Obstetrics & Gynecology 2005;105(5 Pt 1):1084–1091.
91. Leslie JC, Galvin SL, Diehl SJ, Bennett TA, Buescher PA. Infant mortality, low birth weight, and prematurity among Hispanic, white, and African American women in North Carolina. American Journal of Obstetrics & Gynecology 2003;188(5):1238–1240.
92. Miller H, Lesser K, Reed K. Adolescence and very low birth weight infants: a disproportionate association. Obstetrics & Gynecology 1996;87(1):83–88.
93. Craig ED, Thompson JM, Mitchell EA. Socioeconomic status and preterm birth: New Zealand trends, 1980 to 1999. Archives of Disease in Childhood: Fetal and Neonatal Edition 2002;86(3):F142–F146.