title: Before and after.
authors.affiliation: Department of Microbiology, Columbia University College of Physicians and Surgeons, New York, New York 10032.
authors.forename: E A
authors.initials: EA
authors.lastname: Kabat
mesh_terms: D000486:Allergy and Immunology / Q000266:history; D001634:Bibliographies as Topic; D049673:History, 20th Century; D014481:United States