title: PAT Program report: background and current status. Proficiency Analytical Testing.
authors.affiliation: Scientific Affairs Division, AIHA, Fairfax, VA 22031, USA.
authors.forename: F I
authors.initials: FI
authors.lastname: Grunder
authors.forename: C
authors.initials: C
authors.lastname: Bell
mesh_terms: D002623:Chemistry Techniques, Analytical / Q000592:standards*; D007753:Laboratories / Q000592:standards*; D011786:Quality Control; D012016:Reference Values; D014768:Virginia