Validation of a self-administered food-frequency questionnaire administered in the European Prospective Investigation into Cancer and Nutrition (EPIC) Study: comparison of energy, protein, and macronutrient intakes estimated with the doubly labeled water, urinary nitrogen, and repeated 24-h dietary recall methods2
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Key Words
Validity
biomarkers
energy expenditure
epidemiology
dietary recalls
food-frequency questionnaire
doubly labeled water
FFQ
nutrition
EPIC Study
Germany
humans
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Supported by the Federal Ministry of Technology, Germany, and by grant SOC 95 201408 05F02 from the Europe Against Cancer Program of the European Community.
Copyright © 1999 American Society for Nutrition. Published by Elsevier Inc. All rights reserved.