title: Letter: Aphthous ulceration, cromoglycic acid, and cellular immune response.
mesh_terms: D002986:Clinical Trials as Topic; D004205:Cromolyn Sodium / Q000494:pharmacology / Q000627:therapeutic use*; D006801:Humans; D007111:Immunity, Cellular; D066298:In Vitro Techniques; D008213:Lymphocyte Activation / Q000187:drug effects; D013281:Stomatitis, Aphthous / Q000188:drug therapy* / Q000276:immunology
chemical_list: D004205:Cromolyn Sodium