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It is unfortunate that the clinical laboratory in this case is just now learning a painful lesson that was learned almost 30 years ago in the employment drug testing arena. If results from a drug test are to be used for something other than a clinical evaluation and may have adverse legal or adminitrative implications then the inital positive test result must be confirmed by a more analytically specific method (GC/MS, LC/MS/MS/MS). To practice otherwise places the patient in jeopardy, not to mention the potential legal reprocussions against the medical community allowing testing like this to occur. No one with any experience with issues regarding forensic drug testing and possible false-positive results from an immunoassay test method would be surprised at these findings.
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