The EPIC-Norfolk Study

 

The relative validity of vitamin intakes derived from a food frequency questionnaire compared to 24-hour recalls and biological measurements: results from the EPIC pilot study in Germany. European Prospective Investigation into Cancer and Nutrition.

Boeing H, Bohlscheid-Thomas S, Voss S, Schneeweiss S, and Wahrendorf J

International Journal of Epidemiology. Jan 1997

(DOI : 10.1093/ije/26.suppl_1.s82)

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