DOI:
10.1055/s-00000020
Geburtshilfe und Frauenheilkunde
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References
Spallek J, Grosser A, Holler-Holtrichter C. et al.
Early childhood health in Bielefeld, Germany (BaBi study): study protocol of a social-epidemiological birth cohort.
BMJ Open 2017;
7: e018398
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