title: Proficiency testing of clinical chemistry laboratories: the role of the reference laboratory.
authors.forename: S N
authors.initials: SN
authors.lastname: Deming
mesh_terms: D002624:Chemistry, Clinical / Q000592:standards*; D002784:Cholesterol / Q000097:blood; D006801:Humans; D007753:Laboratories / Q000592:standards*; D012015:Reference Standards
chemical_list: D002784:Cholesterol