Lot-to-lot variation in three thyroid-related radioimmunoassay kits.

Abstract

We examined lot-to-lot variation in triiodothyronine, thyroxine, and thyrotropin radioimmunoassay kits over 14-20 months. For the thyroxine assay, less than 20% of the overall variation was attributable to lot-to-lot changes. In contrast, for the triiodothyronine and thyrotropin assays half to two-thirds of the overall variation was attributable to lot-to… (More)

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