Quality assurance in 1984.
D003258:Consumer Behavior; D003365:Costs and Cost Analysis; D004501:Education, Medical; D006302:Health Services Research / Q000379:methods; D006801:Humans; D007256:Information Systems; D008485:Medical Audit; D010819:Physician's Role; D011366:Professional Review Organizations; D011445:Prospective Payment System; D011785:Quality Assurance, Health Care; D014481:United States