Application, validity, and prospect of self-administered food frequency questionnaires for optical reading.
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Deutsches Institut für Ernährungsforschung, Potsdam-Rehbrücke, Deutschland.
D016022:Case-Control Studies; D004435:Eating; D001330:Electronic Data Processing; D006801:Humans; D009749:Nutrition Surveys; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires