title: Letter: Allergy, tolerance, and immunoglobulin A.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D004064:Digestive System / Q000276:immunology; D006969:Hypersensitivity, Immediate; D007108:Immune Tolerance; D007070:Immunoglobulin A; D007073:Immunoglobulin E; D051379:Mice; D051381:Rats
chemical_list: D007070:Immunoglobulin A; D007073:Immunoglobulin E