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Effect of seasonality on the estimated mean value of nutrients and ranking ability of a self-administered diet history questionnaire

Hitomi Suga, Keiko Asakura, Satoshi Sasaki*, Masanori Nojima, Hitomi Okubo, Naoko Hirota, Akiko Notsu, Mitsuru Fukui and Chigusa Date

Nutrition Journal 2014, 13:51  doi:10.1186/1475-2891-13-51

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