DOI:
10.1055/s-00000020
Geburtshilfe und Frauenheilkunde
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References
Voigt M, Briese V, Carstensen M et al.
Age-specific preterm birth rates after exclusion of risk factors – an analysis of the German Perinatal Survey.
Z Geburtshilfe Neonatol 2010;
214: 161-166
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