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The direction of the difference between Canadian and American erythrocyte folate concentrations is dependent on the assay method employed: a comparison of the Canadian Health Measures Survey and National Health and Nutrition Examination Survey.
Colapinto CK, Tremblay MS, Aufreiter S, Bushnik T, Pfeiffer CM, O'Connor DL. Colapinto CK, et al. Br J Nutr. 2014 Dec 14;112(11):1873-81. doi: 10.1017/S0007114514002906. Epub 2014 Oct 8. Br J Nutr. 2014. PMID: 25296277 Free PMC article.
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