Listar MED_Articles por fuente "PLoS ONE 11(11): e0167338"
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Reproducibility and validity of a food frequency questionnaire designed to assess diet in children aged 4-5 years
Public Library of Science (2016)Background The food frequency questionnaire (FFQ) is the most efficient and cost-effective method to investigate the relationship between usual diet and disease in epidemiologic studies. Although FFQs have been validated ...