False-negative result for cocaine metabolites on a lateral-flow drug test slide corrected by dilution.


To the Editor: Cocaine is one of the most widespread drugs of abuse; therefore, clinical laboratories are frequently requested to screen for the presence of cocaine and its metabolites in urine. When screening a urine specimen from a potential study participant for drugs of abuse, using a Verdict II lateral flow test slide (MEDTOX Diagnostics), multiple… (More)


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