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An evaluation of automated methods for measurement of serum 25-hydroxyvitamin D.
Wagner D, Hanwell HE, Vieth R. Wagner D, et al. Among authors: vieth r. Clin Biochem. 2009 Oct;42(15):1549-56. doi: 10.1016/j.clinbiochem.2009.07.013. Epub 2009 Jul 21. Clin Biochem. 2009. PMID: 19631201
RESULTS: DiaSorin LIAISON demonstrated a stronger correlation (r=0.918) and better agreement (bias=-0.88 nmol/L) with DiaSorin RIA than the Roche Modular assay (r=0.871, bias=-2.55 nmol/L). ...
RESULTS: DiaSorin LIAISON demonstrated a stronger correlation (r=0.918) and better agreement (bias=-0.88 nmol/L) with DiaSorin RIA th …
There is no lower threshold level for parathyroid hormone as 25-hydroxyvitamin D concentrations increase.
Vieth R, El-Hajj Fuleihan G. Vieth R, et al. J Endocrinol Invest. 2005 Feb;28(2):183-6. doi: 10.1007/BF03345365. J Endocrinol Invest. 2005. PMID: 15887868 Review. No abstract available.
Sun exposure questionnaire predicts circulating 25-hydroxyvitamin D concentrations in Caucasian hospital workers in southern Italy.
Hanwell HE, Vieth R, Cole DE, Scillitani A, Modoni S, Frusciante V, Ritrovato G, Chiodini I, Minisola S, Carnevale V. Hanwell HE, et al. Among authors: vieth r. J Steroid Biochem Mol Biol. 2010 Jul;121(1-2):334-7. doi: 10.1016/j.jsbmb.2010.03.023. Epub 2010 Mar 16. J Steroid Biochem Mol Biol. 2010. PMID: 20298782
Evidence that vitamin D3 increases serum 25-hydroxyvitamin D more efficiently than does vitamin D2.
Trang HM, Cole DE, Rubin LA, Pierratos A, Siu S, Vieth R. Trang HM, et al. Among authors: vieth r. Am J Clin Nutr. 1998 Oct;68(4):854-8. doi: 10.1093/ajcn/68.4.854. Am J Clin Nutr. 1998. PMID: 9771862 Clinical Trial.
Association between total serum calcium and the A986S polymorphism of the calcium-sensing receptor gene.
Cole DE, Vieth R, Trang HM, Wong BY, Hendy GN, Rubin LA. Cole DE, et al. Among authors: vieth r. Mol Genet Metab. 2001 Feb;72(2):168-74. doi: 10.1006/mgme.2000.3126. Mol Genet Metab. 2001. PMID: 11161843
Extraction and measurement of pamidronate from bone samples using automated pre-column derivatization, high-performance liquid chromatography and fluorescence detection.
King LE, Vieth R. King LE, et al. Among authors: vieth r. J Chromatogr B Biomed Appl. 1996 Apr 12;678(2):325-30. doi: 10.1016/0378-4347(95)00531-5. J Chromatogr B Biomed Appl. 1996. PMID: 8738038
Efficacy and safety of vitamin D3 intake exceeding the lowest observed adverse effect level.
Vieth R, Chan PC, MacFarlane GD. Vieth R, et al. Am J Clin Nutr. 2001 Feb;73(2):288-94. doi: 10.1093/ajcn/73.2.288. Am J Clin Nutr. 2001. PMID: 11157326 Clinical Trial.
Regulation of sodium, calcium and vitamin D metabolism in Dahl rats on a high-salt/low-potassium diet: genetic and neural influences.
Wu X, Vieth R, Milojevic S, Sonnenberg H, Melo LG. Wu X, et al. Among authors: vieth r. Clin Exp Pharmacol Physiol. 2000 May-Jun;27(5-6):378-83. doi: 10.1046/j.1440-1681.2000.03250.x. Clin Exp Pharmacol Physiol. 2000. PMID: 10831239
125I-RIA kit cannot distinguish vitamin D deficiency as well as a more specific assay for 25-hydroxyvitamin D.
Vieth R, Chan A, Pollard A. Vieth R, et al. Clin Biochem. 1995 Apr;28(2):175-9. doi: 10.1016/0009-9120(94)00077-9. Clin Biochem. 1995. PMID: 7628077

However, the RIA exhibited a bias of 11.15 nmol/L (p < 0.05 vs 0), and a correlation coefficient of r = 0.923. When the comparison was confined to the 37 samples in the lower half of our reference range, the RIA did not compare well: slope, 0.764 (p < 0.05 vs 1.0); i

However, the RIA exhibited a bias of 11.15 nmol/L (p < 0.05 vs 0), and a correlation coefficient of r = 0.923. When the comparison

Simple method for determining specific binding capacity of vitamin D-binding protein and its use to calculate the concentration of "free" 1,25-dihydroxyvitamin D.
Vieth R. Vieth R. Clin Chem. 1994 Mar;40(3):435-41. Clin Chem. 1994. PMID: 7510592
The relationship between the inverse of 25D-binding capacity and the free fraction of [3H]1,25-dihydroxyvitamin D3 [1,25(OH)2D3] measured by ultrafiltration isodialysis was essentially linear (r = 0.934, P < 0.0001). ...
The relationship between the inverse of 25D-binding capacity and the free fraction of [3H]1,25-dihydroxyvitamin D3 [1,25(OH)2D3] measured by …
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