DOI:
10.1055/s-00000009
American Journal of Perinatology
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References
Martin JA, Hamilton BE, Ventura SJ. , et al.
Births: final data for 2009. National vital statistics reports: from the Centers for Disease Control and Prevention, National Center for Health Statistics.
Natl Vital Statistics Syst 2011;
60 (01) 1-70
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