title: The professional testing center: past and present.
authors.forename: Christine K
authors.initials: CK
authors.lastname: Cassel
mesh_terms: D002568:Certification / Q000379:methods / Q000592:standards / Q000639:trends*; D004995:Ethics, Professional; D007388:Internal Medicine / Q000592:standards* / Q000639:trends; D012637:Security Measures; D014481:United States