title: National Board fees: historical and comparative perspectives.
authors.affiliation: National Board of Examiners in Optometry, Bethesda, Maryland 20814, USA. wallis@optometry.org
authors.forename: N E
authors.initials: NE
authors.lastname: Wallis
mesh_terms: D005249:Fees and Charges / Q000266:history; D049673:History, 20th Century; D006801:Humans; D008004:Licensure / Q000191:economics* / Q000266:history; D009907:Optometry / Q000191:economics* / Q000266:history; D013044:Specialty Boards / Q000191:economics* / Q000266:history