title: PAT Program report: background and current status. Proficiency Analytical Testing.
authors.affiliation: AIHA's Scientific Affairs Division, Laboratory Quality Assurance Programs, Fairfax, VA 22031, USA.
authors.forename: F I
authors.initials: FI
authors.lastname: Grunder
mesh_terms: D006801:Humans; D007753:Laboratories; D016272:Occupational Health; D012016:Reference Values