title: Letter: Complement in bronchial asthma.
mesh_terms: D000293:Adolescent; D001249:Asthma / Q000209:etiology / Q000276:immunology*; D002648:Child; D002675:Child, Preschool; D003181:Complement C4 / Q000032:analysis*; D003165:Complement System Proteins / Q000032:analysis*; D006801:Humans; D006967:Hypersensitivity / Q000276:immunology
chemical_list: D003181:Complement C4; D003165:Complement System Proteins