DOI:
10.1055/s-00000009
American Journal of Perinatology
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References
Eunice Kennedy Shriver NICHD: Neonatal Research (NRN) Network.
Available at:
http://www.nichd.nih.gov/research/supported/Pages/nrn.aspx and Maternal Fetal Medicine Units Network. Available at:
http://www.nichd.nih.gov/research/supported/Pages/mfmu.aspx . Accessed: March 20, 2014
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