title: Natural history of "atopy".
mesh_terms: D004777:Environment; D006801:Humans; D006967:Hypersensitivity / Q000453:epidemiology / Q000235:genetics / Q000276:immunology; D007071:Immunoglobulin A, Secretory / Q000032:analysis; D007073:Immunoglobulin E / Q000096:biosynthesis; D044469:Racial Groups; D012621:Seasons
chemical_list: D007071:Immunoglobulin A, Secretory; D007073:Immunoglobulin E