WG-STFT

AcronymDefinition
WG-STFTWorking Group for Standardization of Thyroid Function Tests (International Federation of Clinical Chemistry and Laboratory Medicine)
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International Federation of Clinical Chemistry and Laboratory Medicine (IFCC) Working Group for Standardization of Thyroid Function Tests (WG-STFT).
Owing to these concerns raised by the manufacturers, the WG-STFT recognizes that, in addition to the technical aspects of harmonization, it is also important to address issues such as support or acceptance by clinicians, regulatory bodies, and organizers of Proficiency Testing/External Quality Assessment sufficiently early in the process.
Acknowledgments: The Chair of the IFCC WG-STFT (L.M.
[11] Nonstandard abbreviations: FTH, free thyroid hormone; FT4, free thyroxine; FT3, free triiodothyronine; WG-STFT, Working Group for Standardization of Thyroid Function Tests; ED-ID-LC-MS/MS, equilibrium dialysis-isotope dilution-liquid chromatography/tandem mass spectrometry; RMP, reference measurement procedure; cRMP, candidate RMP; IQC, internal quality control; [CV.sub.w], within-run CV; [CV.sub.t], total CV.
Here, we report on the WG-STFT method comparison studies performed between TT4 and TT3 commercial immunoassays and their respective ID-LC/ tandem MS RMPs.
[11] Nonstandard abbreviations: TT4, total thyroxine; TT3, total triiodothyronine; WG-STFT, Working Group for Standardization of Thyroid Function Tests; IDLC/tandem MS, isotope dilution-liquid chromatography/tandem mass spectrometry; RMP, reference measurement procedure; IQC, internal QC; [CV.sub.w], within-run CV; [CV.sub.t], total CV.