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P.J. Twomey
P.J. Twomey
Charing Cross Hospital
Endocrinology
Internal medicine
Biology
External quality assessment
reference measurement
4
Papers
62
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BIOTIN SUPPLEMENTATION CAUSES ERRONEOUS ELEVATIONS OF RESULTS IN SOME COMMERCIAL SERUM 25-HYDROXYVITAMIN D (25OHD) ASSAYS
2020
The Journal of Steroid Biochemistry and Molecular Biology
Graham D. Carter
J. Berry
Etienne Cavalier
R. Durazo-Arvizu
E. Gunter
G Jones
J. Jones
K. Phinney
C.T. Sempos
P.J. Twomey
Emma L. Williams
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Citations (3)
Estimating uncertainty of target values for DEQAS serum materials
2019
The Journal of Steroid Biochemistry and Molecular Biology
R. Durazo-Arvizu
F. Ahmed
J. Berry
Etienne Cavalier
E. Gunter
G Jones
J. Jones
C.T. Sempos
P.J. Twomey
E.L. Williams
G.D. Carter
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Citations (4)
External Quality Assessment of 24,25-dihydroxyvitamin D3 (24,25(OH)2D3) assays
2019
The Journal of Steroid Biochemistry and Molecular Biology
G.D. Carter
F. Ahmed
J. Berry
Etienne Cavalier
R. Durazo-Arvizu
E. Gunter
G Jones
J. Jones
K.W. Phinney
C.T. Sempos
P.J. Twomey
E.L. Williams
Stephen A. Wise
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Citations (5)
Hydroxyvitamin D assays: An historical perspective from DEQAS
2017
The Journal of Steroid Biochemistry and Molecular Biology
G.D. Carter
J. Berry
R. Durazo-Arvizu
E. Gunter
G Jones
J. Jones
H.L.J. Makin
P. Pattni
Christopher T. Sempos
P.J. Twomey
E.L. Williams
Stephen A. Wise
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Citations (50)
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