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Validity of a self-administered food frequency questionnaire (FFQ) and its generalizability to the estimation of dietary folate intake in Japan

✍ Scribed by Junko Ishihara; Seiichiro Yamamoto; Hiroyasu Iso; Manami Inoue; Shoichiro Tsugane; the JPHC FFQ Validation Study Group

No coin nor oath required. For personal study only.

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