Dear Mailbase
We are seeing quite a large drop in our Randox IA controls for PSA mid and high levels
Lot 178 (1/2/3) exp 01/20
this is on both our e801 lines and also - 2 weeks later- our e601 at another site.
EQA seem OK, Roche QC seem OK
Unrelated to calibrators or reagent lots etc
So we are considering whether it is general deterioration in the QC material or a specific delivery of the material was environmentally challenged.
Anyone else seeing the same
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