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2. Clinical Laboratory Improvement Amendments (CLIA) of 1988, US Public Law 100-575
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4. Libeer J-C, Baadenhuijsen H, Fraser C, Hyltoft Petersen P, Ricos C, Stockl D, Thienpoint L (1996) Characterization and classification of external quality assessment Schemes (EQA) according to objectives such as evaluation of method and participant bias and standard deviation. Eur J Clin Chem Clin Biochem 34:665–678
5. BS EN 14136:2004: Use of external quality assessment schemes in the assessment of the performance of in vitro diagnostic products. British Standards Institute