title: Adding value to proficiency testing programs.
authors.forename: G S
authors.initials: GS
authors.lastname: Cembrowski
authors.forename: R N
authors.initials: RN
authors.lastname: Carey
mesh_terms: D019963:Clinical Chemistry Tests / Q000592:standards; D019411:Clinical Laboratory Techniques / Q000592:standards*; D003627:Data Interpretation, Statistical; D011786:Quality Control