DOI: 10.1055/s-00000009

American Journal of Perinatology

References

Hamilton BE, Martin JA, Osterman MJK, Curtin SC, Mathews TJ.
Births: Final Data for 2013. National vital statistics reports. Centers for Disease Control and Prevention, National Center for Health Statistics.

National Vital Statistics System 2015;
64 (12) 1-64

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