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Validity of a self-administered food frequency questionnaire (FFQ) and its generalizability to the estimation of dietary folate intake in Japan
BACKGROUND: In an epidemiological study, it is essential to test the validity of the food frequency questionnaire (FFQ) for its ability to estimate dietary intake. The objectives of our study were to 1) validate a FFQ for estimating folate intake, and to identify the foods that contribute to inter-i...
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| Main Authors: | , , , , |
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| Format: | Artigo |
| Sprog: | Inglês |
| Udgivet: |
BioMed Central
2005
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| Fag: | |
| Online adgang: | https://ncbi.nlm.nih.gov/pmc/articles/PMC1277847/ https://ncbi.nlm.nih.gov/pubmed/16202175 https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1186/1475-2891-4-26 |
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