Validity and reproducibility of folate and vitamin B12 intakes estimated from a self-administered diet history questionnaire in Japanese pregnant women

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Validity and reproducibility of folate and vitamin B₁₂intakes estimated from a self-administered diet history questionnaire in Japanese pregnant women

Mie Shiraishi^*, Megumi Haruna, Masayo Matsuzaki, Ryoko Murayama, Satoshi Sasaki and Sachiyo Murashima

Nutrition Journal 2012, 11:15 doi:10.1186/1475-2891-11-15