Presidential address: Quality assurance.
D000486:Allergy and Immunology; D002568:Certification; D006280:Health Workforce / Q000600:supply & distribution; D006967:Hypersensitivity / Q000175:diagnosis; D008722:Methods; D011366:Professional Review Organizations; D011787:Quality of Health Care; D012647:Self-Assessment; D012955:Societies, Medical; D014481:United States