Lucey JF, Rowan CA, Shiono P, Wilkinson AR, Kilpatrick S, Payne NR, Horbar JD, Carpenter J, Rogowski J, Soll RF. Fetal infants: The fate of 4172 infants with birth weights of 401 to 500 grams-The Vermont Oxford Network experience (1996-2000). Pediatrics. 2004;113(6): 1559-1566. PubMed: 15173474