title: Pioneers and milestones. Clemens von Pirquet, MD (1874-1929).
authors.affiliation: National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA.
authors.forename: Sheldon G
authors.initials: SG
authors.lastname: Cohen
mesh_terms: D000486:Allergy and Immunology / Q000266:history; D001317:Austria; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D006967:Hypersensitivity / Q000266:history*; D010372:Pediatrics / Q000266:history