Reproducibility and relative validity of food group intake in a food frequency questionnaire developed for the Tehran Lipid and Glucose Study.

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Firoozeh Hosseini Esfahani
Golaleh Asghari
Parvin Mirmiran
Fereidoun Azizi
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Abstract
To examine the validity and reproducibility of food groups in the semi-quantitative food frequency questionnaire (FFQ) developed for the Tehran Lipid and Glucose Study (TLGS).
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