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Relative validity of a semiquantitative food frequency questionnaire designed for schoolchildren in western Greece
BACKGROUND: The use of food frequency questionnaires (FFQs) has become increasingly important in epidemiologic studies. During the past few decades, a wide variety of nutritional studies have used the semiquantitative FFQ as a tool for assessing and evaluating dietary intake. One of the main concern...
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| Main Authors: | , |
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| Formato: | Artigo |
| Idioma: | Inglês |
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BioMed Central
2009
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| Acceso en liña: | https://ncbi.nlm.nih.gov/pmc/articles/PMC2649946/ https://ncbi.nlm.nih.gov/pubmed/19196469 https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1186/1475-2891-8-8 |
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