Search Results - "Carter, G D"

25-Hydroxyvitamin D assays: Potential interference from other circulating vitamin D metabolites by Carter, G.D., Jones, J.C., Shannon, J., Williams, E.L., Jones, G., Kaufmann, M., Sempos, C.

“…•Both 3-epi-25-OHD3 and 24,25-dihydroxyvitamin D (24,25(OH)2D) show a strong correlation with 25-OHD3.•3-epi-25-hydroxyvitamin D(3-epi-25-OHD) does not cross…”
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Proficiency testing of 25-Hydroxyvitamin D (25-OHD) assays by Carter, G.D., Berry, J.L., Gunter, E., Jones, G., Jones, J.C., Makin, H.L.J., Sufi, S., Wheeler, M.J.

“…The Vitamin D External Quality Assessment Scheme (DEQAS) has been monitoring 25-OHD assay performance since 1989. The scheme has expanded rapidly in recent…”
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Biotin supplementation causes erroneous elevations of results in some commercial serum 25-hydroxyvitamin d (25OHD) assays by Carter, GD, Berry, J, Cavalier, E, Durazo-Arvizu, R, Gunter, E, Jones, G, Jones, J, Phinney, K, Sempos, CT, Twomey, PJ, Williams, EL

“…The Vitamin D External Quality Assessment Scheme (DEQAS) distributes serum samples globally, on a quarterly basis, to assess participants’ performance of…”
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Estimating uncertainty of target values for DEQAS serum materials by Durazo-Arvizu, R.A., Ahmed, F., Berry, J., Cavalier, E., Gunter, E., Jones, G., Jones, J., Sempos, C.T., Twomey, P.J., Williams, E.L., Carter, G.D.

“…•Estimation of Total 25-Hydroxyvitamin D target values require estimation of uncertainty around them.•Total combined uncertainty of target values can be…”
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The anomalous behaviour of exogenous 25-hydroxyvitamin D in competitive binding assays by Carter, G.D., Jones, J.C., Berry, J.L.

“…The Vitamin D International External Quality Assessment Scheme (DEQAS) was established in 1989 to monitor the performance of assays for 25-hydroxyvitamin D…”
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Measurement of Vitamin D metabolites: an international perspective on methodology and clinical interpretation by Carter, G.D., Carter, C.R., Gunter, E., Jones, J., Jones, G., Makin, H.L.J., Sufi, S.

“…The International Quality Assessment Scheme for Vitamin D metabolites (DEQAS) was introduced in 1989. Initially, the aim was to improve the reliability of…”
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External Quality Assessment of 24,25-dihydroxyvitamin D3 (24,25(OH)2D3) assays by Carter, G.D., Ahmed, F., Berry, J., Cavalier, E., Durazo-Arvizu, R., Gunter, E., Jones, G., Jones, J., Phinney, K., Sempos, C.T., Twomey, P.J., Williams, E.L., Wise, S.A

“…•DEQAS is an accuracy-based External Quality Assessment Scheme EQA) for 25-OHD and is running a pilot EQA scheme for 24,25(OH)2D3.•Serum 24,25(OH)2D3 is highly…”
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Vitamin D measurement standardization: The way out of the chaos by Binkley, N., Dawson-Hughes, B., Durazo-Arvizu, R., Thamm, M., Tian, L., Merkel, J.M., Jones, J.C., Carter, G.D., Sempos, C.T.

“…•The lack of standardized laboratory measurement of serum total 25-hydroxyvitamin D [25-OHD] in vitamin D research impedes development of consensus 25-OHD…”
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Developing vitamin D dietary guidelines and the lack of 25-hydroxyvitamin D assay standardization: The ever-present past by Sempos, C.T., Durazo-Arvizu, R.A., Binkley, N., Jones, J., Merkel, J.M., Carter, G.D.

“…•25(OH)D used to define states of vitamin D status, e.g., deficient, and sufficient.•Unstandardized 25(OH)D data is the fundamental limitation thwarting that…”
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Bisphosphonates and avascular necrosis of the jaws by Carter, G D, Goss, Alastair N

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In a population study, can parathyroid hormone aid the definition of adequate vitamin D status? A study of people aged 65 years and over from the British National Diet and Nutrition survey by BATES, C. J, CARTER, G. D, MISHRA, G. D, O'SHEA, D, JONES, J, PRENTICE, A

“…The British National Diet and Nutrition Survey of people aged 65 years and over in 1994-5 provided nationally representative estimates of food and nutrient…”
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Hydroxyvitamin D assays: An historical perspective from DEQAS by Carter, G.D., Berry, J., Durazo-Arvizu, R., Gunter, E., Jones, G., Jones, J., Makin, H.L.J., Pattni, P., Sempos, C.T., Twomey, P., Williams, E.L., Wise, S.A.

“…•DEQAS is an international Quality Assessment Scheme for vitamin D metabolites which works closely with the Vitamin D Standardization Program (VDSP).•The…”
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Isomorph Invariance of Higher-Order Structural Measures in Four Lennard-Jones Systems by Rahman, Mahajabin, Carter, Benjamin M G D, Saw, Shibu, Douglass, Ian M, Costigliola, Lorenzo, Ingebrigtsen, Trond S, Schrøder, Thomas B, Pedersen, Ulf R, Dyre, Jeppe C

“…In the condensed liquid phase, both single- and multicomponent Lennard-Jones (LJ) systems obey the "hidden-scale-invariance" symmetry to a good approximation…”
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A spectrally efficient service apportionment method for sharing and compatibility studies by Flood, I. D., Parker, J. R., Carter, G. D.

“…A key aspect of radio spectrum sharing and compatibility studies is the modelling of interference levels seen by the receivers of one service from the…”
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Cost effective measures to standardize serum 25(OH)D values from completed studies by Sempos, C. T., Durazo-Arvizu, R. A., Carter, G. D.

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Quality assessment of vitamin D metabolite assays used by clinical and research laboratories by Carter, G.D., Berry, J., Durazo-Arvizu, R., Gunter, E., Jones, G., Jones, J., Makin, H.L.J, Pattni, P., Phinney, K.W., Sempos, C.T., Williams, E.L.

“…•DEQAS (the Vitamin D External Quality Assessment Scheme) monitors the analytical performance of total 25-OHD, 1,25(OH)2D and 24,25(OH)2D.•Some immunoassays…”
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External Quality Assessment of 24,25-dihydroxyvitamin D 3 (24,25(OH) 2 D 3 ) assays by Carter, G D, Ahmed, F, Berry, J, Cavalier, E, Durazo-Arvizu, R, Gunter, E, Jones, G, Jones, J, Phinney, K, Sempos, C T, Twomey, P J, Williams, E L, Wise, S A

“…The discovery that mutations of the CYP24A1 gene are a cause of idiopathic infantile hypercalcemia (IIH) has revived interest in measuring serum 24,25(OH) D …”
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Automated immunoassays for 25-hydroxyvitamin D (25-OHD): Do plasticisers interfere? by Carter, G.D., Jones, J., Ketheeswaran, M., Shannon, J., Singh, B., Kearney, E., Berry, J.L.

“…•DEQAS is an accuracy based quality assessment scheme for vitamin D metabolites.•Blood collection bags may leach plasticisers that could interfere in 25-OHD…”
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Significance of an index of insulin resistance on admission in non-diabetic patients with acute coronary syndromes by Stubbs, P J, Alaghband-Zadeh, J, Laycock, J F, Collinson, P O, Carter, G D, Noble, M I M

“…BACKGROUND Insulin resistance is associated with ischaemic heart disease and has been proposed as a risk factor for subsequent myocardial infarction. AIM To…”
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Maternal thyroid function in multifetal pregnancies before and after fetal reduction by Ogueh, O, Hawkins, AP, Abbas, A, Carter, GD, Nicolaides, KH, Johnson, MR

“…The aim of the study was to investigate maternal thyroid function in pregnancy by monitoring the circulating concentrations of thyroid stimulating hormone…”
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