title: Proficiency testing: one important component of continuous quality improvement.
authors.forename: C L
authors.initials: CL
authors.lastname: Strand
mesh_terms: D005243:Feces / Q000469:parasitology; D006801:Humans; D007753:Laboratories / Q000592:standards*; D008004:Licensure; D010338:Pathology, Clinical / Q000592:standards*; D011785:Quality Assurance, Health Care