DOI:
10.1055/s-00000020
Geburtshilfe und Frauenheilkunde
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References
Centre for Reviews and Dissemination (CRD).
Systematic reviews; CRDʼs guidance for undertaking reviews in health care 2009 (internet).
University of York: CRD; 2009. Accessed July 29, 2020 at:
https://www.york.ac.uk/media/crd/Systematic_Reviews.pdf
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