DOI:
10.1055/s-00000020
Geburtshilfe und Frauenheilkunde
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References
Winkler G, Doring A.
Validation of a short qualitative food frequency list used in several German large scale surveys.
Z Ernahrungswiss 1998;
37: 234-241
DOI: 10.1007/pl00007377.
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