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Open Access Research

Relative validation of a food frequency questionnaire for national health and nutrition monitoring

Marjolein Haftenberger, Thorsten Heuer, Christin Heidemann, Friederike Kube, Carolin Krems and Gert BM Mensink*

Nutrition Journal 2010, 9:36  doi:10.1186/1475-2891-9-36

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