DOI:
10.1055/s-00000020
Geburtshilfe und Frauenheilkunde
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References
Blencowe H, Cousens S, Oestergaard MZ et al.
National, regional, and worldwide estimates of preterm birth rates in the year 2010 with time trends since 1990 for selected countries: a systematic analysis and implications.
Lancet 2012;
379: 2162-2172
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