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Method comparison with cortisol, testosterone, progesterone, DHEAS, androstenedione, and 17-hydroxyprogesterone UKNEQAS samples was performed (n = 30 for each).
With respect to the UKNEQAS programme, all forty-five ENA analytes spanning the range SSA, SSB, RNP, Scl-70, Sm/ RNP, Jo-1and Sm with a further seven negative sera (fifty-two in total) were respectively detected or not detected (Table 5).
 Nonstandard abbreviations: HPLC-ESI-MS/MS, HPLC-electrospray ionization-tandem mass spectrometry; IS, internal standard; SIR, sirolimus; DMR, desmethoxyrapamycin; SIR-[d.sub.3], deuterium-labeled sirolimus; UKNEQAS, United Kingdom National External Quality Assessment Scheme.
(3,19,31,45,46) Proficiency testing/EQA providers, such as CAP and UKNEQAS, facilitate sample exchanges among laboratories for tests without formal PT/EQA schemes.
Results for samples from UKNEQAS and for the in-house recovery experiments are shown in Table 3.
Five reference laboratories that used chromatographic methods were selected from among UKNEQAS participants.
In the United Kingdom and Europe, schemes such as the UK National External Quality Assessment Scheme (UKNEQAS) (3) and the European Molecular Genetics Quality Network (EMQN) (4) are going some way to addressing these issues.
For quality assurance, the laboratory is part of United Kingdom National External Quality Assessment Scheme (UKNEQAS) program for cholesterol and triglycerides.
However, this method is used by only 3 of 118 laboratories participating in the British quality assessment scheme (UKNEQAS) (20).
5) with the mean [United Kingdom National External Quality Assessment Scheme (UKNEQAS)] DCCT-aligned values (x) of 5.8%-12.0%.
(1) by the United Kingdom National External Quality Assessment Scheme (UKNEQAS) (2); however, most of the data have been presented only in preliminary form.
This discrepancy between the two assays prompted an investigation into the response of other assays to this patient's sample, utilizing the United Kingdom External Quality Assessment Scheme (UKNEQAS).
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