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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 methods

NutritionNutritional EpidemiologyBody CompositionDietary ExposureMacronutrient IntakesPublic Health NutritionSelf-administered Food-frequency QuestionnairePublic HealthWestern Pattern DietEuropean Prospective InvestigationNutrition Assessment