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Twenty years of the Me.Tos. Project: an Italian national external quality assessment scheme for trace elements in biological fluids
Authors:Marina Patriarca   Ferdinando Chiodo   Marco Castelli   Federica Corsetti  Antonio Menditto
Affiliation:Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Roma, Italy
Abstract:The Me.Tos. Project, started in 1983 and still running, is an external quality assessment (EQA) scheme for laboratories performing specialized analyses in occupational and environmental laboratory medicine. Besides the organization of EQA exercises, initiatives for further education of the participants and the harmonization of EQA procedures at a European level are carried out. Participation in EQA schemes allows laboratories to comply with the international standards for the quality and competence of testing and clinical laboratories. The organization of the scheme includes the preparation of control materials, their distribution to the participants, according to strategies aimed to avoid identification of the samples, the statistical analysis of the results and the evaluation of laboratories' performance according to international guidelines and criteria set by the organizers. An overview of the scheme operation and the current performances of participants will be given.
Keywords:Quality specification   Laboratory performance   Reference material   Interlaboratory comparison
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