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Validity and reproducibility of folate and vitamin B12 intakes 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

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