title: PAT Program report: background and current status.
authors.forename: Fred I
authors.initials: FI
authors.lastname: Grunder
mesh_terms: D002623:Chemistry Techniques, Analytical; D007753:Laboratories / Q000458:organization & administration / Q000592:standards*; D016273:Occupational Exposure / Q000032:analysis*; D011786:Quality Control; D012016:Reference Values; D014481:United States