Hair Drug Test Cut-off Levels and Hair Dose Response

FREQUENTLY ASKED QUESTIONS Quest Diagnostics Hair Testing DRUGS & CUTOFFS – TECHNICAL EXPLANATIONS Q: Why drug test? ... a hair test is the most effective way to evaluate long-term patterns of repetitive drug use, ... offer greater sensitivity than most EIA procedures. Q: What is the difference between GC/MS and GC/MS/MS? ... ................
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