DOI:
10.1055/s-00000009
American Journal of Perinatology
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References
Martin JA, Hamilton BE, Sutton PD, Ventura SJ, Mathews TJ, Osterman MJ.
Births: final data for 2008.
Natl Vital Stat Rep 2010;
59 (1) 1 , 3–71. Available at:
http://www.cdc.gov/nchs/data/nvsr/nvsr59/nvsr59_01.pdf . Accessed June 22, 2012
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