title: [Essential criteria for quality systems in medical laboratories. Conféderation des communautés européenes chimie clinique (European Communities Confederation for Clinical Chemistry, EC4)].
mesh_terms: D002624:Chemistry, Clinical / Q000592:standards*; D005062:European Union; D007753:Laboratories / Q000592:standards*; D011641:Public Relations; D011785:Quality Assurance, Health Care; D011786:Quality Control