Objective: To assess the validity of a semi-quantitative food-frequency questionnaire (SFFQ) used in a large nation-wide dietary survey among 12-month-old Norwegian infants. Methods: The SFFQ was ...
Self-administered food frequency questionnaires (FFQs) are the most economical method to estimate dietary intake of foods or nutrients in large-scale epidemiological studies. However, FFQs are prone ...
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