7.1
Further research into the analytical and clinical validity of the enzyme‑linked immunosorbent assay (ELISA) kits (LISA‑TRACKER, IDKmonitor and Promonitor) is recommended, specifically on:
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the best methods to measure tumour necrosis factor (TNF)‑alpha‑inhibitor levels in the presence of antibodies to TNF‑alpha inhibitors
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developing primary reference standards
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the accuracy for predicting clinical state
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clinically meaningful thresholds.