Search Results - "Carter, G.D."

LC-MS/MS for the analysis of 25-hydroxyvitamin D: Much more than a single technique by Couchman, L, Carter, G.D, Jones, J.C, Moniz, C

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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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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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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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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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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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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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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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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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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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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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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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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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Oral spironolactone: an effective treatment for acne vulgaris in women by Muhlemann, M F, Carter, G D, Cream, J J, Wise, P

“…The effect of oral spironolactone (200 mg daily) on acne vulgaris has been studied in 21 women in a randomized, placebo-controlled, double-blind crossover…”
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