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Comparison of serum and red blood cell folate microbiologic assays for national population surveys.

Pfeiffer CM, Zhang M, Lacher DA, Molloy AM, Tamura T, Yetley EA, Picciano MF, Johnson CL.

J Nutr. 2011 Jul;141(7):1402-9. doi: 10.3945/jn.111.141515. Epub 2011 May 25.


Folate status and concentrations of serum folate forms in the US population: National Health and Nutrition Examination Survey 2011-2.

Pfeiffer CM, Sternberg MR, Fazili Z, Lacher DA, Zhang M, Johnson CL, Hamner HC, Bailey RL, Rader JI, Yamini S, Berry RJ, Yetley EA.

Br J Nutr. 2015 Jun 28;113(12):1965-77. doi: 10.1017/S0007114515001142. Epub 2015 Apr 28.


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.

Pfeiffer CM, Hughes JP, Durazo-Arvizu RA, Lacher DA, Sempos CT, Zhang M, Yetley EA, Johnson CL.

J Nutr. 2012 May;142(5):894-900. doi: 10.3945/jn.111.156901. Epub 2012 Mar 21.


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.

Pfeiffer CM, Hughes JP, Lacher DA, Bailey RL, Berry RJ, Zhang M, Yetley EA, Rader JI, Sempos CT, Johnson CL.

J Nutr. 2012 May;142(5):886-93. doi: 10.3945/jn.111.156919. Epub 2012 Mar 21.


Low serum and red blood cell folate are moderately, but nonsignificantly associated with increased risk of invasive cervical cancer in U.S. women.

Weinstein SJ, Ziegler RG, Frongillo EA Jr, Colman N, Sauberlich HE, Brinton LA, Hamman RF, Levine RS, Mallin K, Stolley PD, Bisogni CA.

J Nutr. 2001 Jul;131(7):2040-8.


Biomarkers of folate status in NHANES: a roundtable summary.

Yetley EA, Pfeiffer CM, Phinney KW, Fazili Z, Lacher DA, Bailey RL, Blackmore S, Bock JL, Brody LC, Carmel R, Curtin LR, Durazo-Arvizu RA, Eckfeldt JH, Green R, Gregory JF 3rd, Hoofnagle AN, Jacobsen DW, Jacques PF, Molloy AM, Massaro J, Mills JL, Nexo E, Rader JI, Selhub J, Sempos C, Shane B, Stabler S, Stover P, Tamura T, Tedstone A, Thorpe SJ, Coates PM, Johnson CL, Picciano MF.

Am J Clin Nutr. 2011 Jul;94(1):303S-312S. doi: 10.3945/ajcn.111.013011. Epub 2011 May 18. Review.


Does obesity modify the association of supplemental folic acid with folate status among nonpregnant women of childbearing age in the United States?

Tinker SC, Hamner HC, Berry RJ, Bailey LB, Pfeiffer CM.

Birth Defects Res A Clin Mol Teratol. 2012 Oct;94(10):749-55. doi: 10.1002/bdra.23024. Epub 2012 May 29.


Trends in blood folate and vitamin B-12 concentrations in the United States, 1988 2004.

Pfeiffer CM, Johnson CL, Jain RB, Yetley EA, Picciano MF, Rader JI, Fisher KD, Mulinare J, Osterloh JD.

Am J Clin Nutr. 2007 Sep;86(3):718-27.


Blood folate and vitamin B12: United States, 1988-94.

Wright JD, Bialostosky K, Gunter EW, Carroll MD, Najjar MF, Bowman BA, Johnson CL.

Vital Health Stat 11. 1998 Dec;(243):1-78.


Obesity is associated with increased red blood cell folate despite lower dietary intakes and serum concentrations.

Bird JK, Ronnenberg AG, Choi SW, Du F, Mason JB, Liu Z.

J Nutr. 2015 Jan;145(1):79-86. doi: 10.3945/jn.114.199117. Epub 2014 Nov 12.


Microbiological assay for serum, plasma, and red cell folate using cryopreserved, microtiter plate method.

Molloy AM, Scott JM.

Methods Enzymol. 1997;281:43-53. No abstract available.


Did national folic acid fortification reduce socioeconomic and racial disparities in folate status in the US?

Dowd JB, Aiello AE.

Int J Epidemiol. 2008 Oct;37(5):1059-66. doi: 10.1093/ije/dyn066. Epub 2008 May 2.


Blood folate concentrations analyzed by microbiological assay and chemiluminescent immunoassay methods.

Nakazato M, Maeda T, Emura K, Maeda M, Tamura T.

J Nutr Sci Vitaminol (Tokyo). 2012;58(1):59-62.


Microbiological assay on microtitre plates of folate in serum and red cells.

O'Broin S, Kelleher B.

J Clin Pathol. 1992 Apr;45(4):344-7.

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