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

The use of Blood Concentrations of Vitamins and their Respective Functional Indicators to Define Folate and Vitamin B12 Status

(2015) Jacob Selhub et al.   FOOD AND NUTRITION BULLETIN

Folic acid supplement use is the most significant predictor of folate concentrations in Canadian women of childbearing age

(2012) Cynthia K. Colapinto et al.   Applied Physiology Nutrition and Metabolism

Changes in Measurement Procedure from a Radioassay to a Microbiologic Assay Necessitate Adjustment of Serum and RBC Folate Concentrations in the U.S. Population from the NHANES 1988–2010

(2012) Christine M. Pfeiffer et al.   JOURNAL OF NUTRITION

Estimation of Trends in Serum and RBC Folate in the U.S. Population from Pre- to Postfortification Using Assay-Adjusted Data from the NHANES 1988–2010

(2012) Christine M. Pfeiffer et al.   JOURNAL OF NUTRITION

Folate and vitamin B-12 biomarkers in NHANES: history of their measurement and use

(2011) Elizabeth A Yetley et al.   AMERICAN JOURNAL OF CLINICAL NUTRITION

Women's compliance with current folic acid recommendations and achievement of optimal vitamin status for preventing neural tube defects

(2011) B. McNulty et al.   HUMAN REPRODUCTION

Comparison of Serum and Red Blood Cell Folate Microbiologic Assays for National Population Surveys

(2011) Christine M. Pfeiffer et al.   JOURNAL OF NUTRITION

Folic Acid Food Fortification—Its History, Effect, Concerns, and Future Directions

(2011) Krista S. Crider et al.   Nutrients

Folic acid fortification above mandated levels results in a low prevalence of folate inadequacy among Canadians

(2010) Yaseer A Shakur et al.   AMERICAN JOURNAL OF CLINICAL NUTRITION

Folic Acid Intake Among U.S. Women Aged 15–44 Years, National Health and Nutrition Examination Survey, 2003–2006

(2010) Sarah C. Tinker et al.   AMERICAN JOURNAL OF PREVENTIVE MEDICINE

Folate status of the population in the Canadian Health Measures Survey

(2010) C. K. Colapinto et al.   CANADIAN MEDICAL ASSOCIATION JOURNAL