title: The ABFM begins to use differential item functioning.
authors.forename: Thomas R
authors.initials: TR
authors.lastname: O'Neill
authors.forename: Michael R
authors.initials: MR
authors.lastname: Peabody
authors.forename: James C
authors.initials: JC
authors.lastname: Puffer
mesh_terms: D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D008004:Licensure; D010821:Physicians, Family / Q000592:standards*; D013044:Specialty Boards; D014481:United States