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...Best practices frequency of testing random witness collection specimen integrity custody control accurate results confirmation rapid turn around time drug basics reasons for why act as a deterrent to future use identify participants who are maintaining abstinence have relapsed intervention efficient utilization limited resources provides incentive support and accountability adjunct treatment frames sanction decisions specimens urine current choice generally readily available large quantities contains high concentrations drugs good analytical both recent past usage alternative breath hair sweat patch test saliva oral fluids characteristics scientifically valid employs proven methods techniques accepted by the scientific community legally defensible able withstand challenge established court track record scrutinized legal judicial review therapeutically beneficial profile client s appropriate response...