title: Voluntary proficiency testing: a step toward excellence.
authors.affiliation: Wisconsin State Laboratory of Hygiene, University of Wisconsin-Madison.
authors.forename: N J
authors.initials: NJ
authors.lastname: Bourdeau
mesh_terms: D002568:Certification / Q000458:organization & administration; D019411:Clinical Laboratory Techniques / Q000592:standards*; D003657:Decision Making; D017056:Medical Laboratory Personnel / Q000331:legislation & jurisprudence / Q000592:standards*; D010934:Planning Techniques; D011361:Professional Competence / Q000592:standards*; D015397:Program Evaluation / Q000379:methods; D013048:Specimen Handling / Q000592:standards*; D014481:United States