DOI:
10.1055/s-00000009
American Journal of Perinatology
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References
Ruiz RJ, Saade GR, Brown CE. et al.
The effect of acculturation on progesterone/estriol ratios and preterm birth in Hispanics.
Obstet Gynecol 2008;
111 (2 Pt 1): 309-316
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