Assays, tests, assessment methods field studies

The second phase is the determination of the number or percentage of true positive results achieved with the test in a population of animals that have been dosed with the compound of interest. This is an essential phase in the development of residue methods and the rigorous assessment of the true positive rate requires confirmation by a separate accepted assay method(s). In addition, part of this study may need to be performed under field conditions, particularly if the test is intended to be used in a non-laboratory environment. 

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