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Fig. 1 | BMC Medicine

Fig. 1

From: Validity of an online 24-h recall tool (myfood24) for dietary assessment in population studies: comparison with biomarkers and standard interviews

Fig. 1

myfood24 validation study design overview. Each 24-h recall (the interviewer-based multiple-pass 24-h recall and myfood24 online tool in random order) and a suite of reference measures (biomarkers and total energy expenditure) were completed on 3 separate occasions separated by approximately 2 weeks. At each occasion, the reference measure was followed 1–3 days later by the first 24-h recall method, which was followed 2–4 days later by the second 24-h recall method

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