title: Changes in free histamine in peripheral circulation following cockroach-antigen challenge in asthmatics.
mesh_terms: D000293:Adolescent; D000328:Adult; D000941:Antigens / Q000276:immunology*; D001249:Asthma / Q000276:immunology*; D001985:Bronchial Provocation Tests; D003058:Cockroaches / Q000276:immunology*; D006632:Histamine / Q000097:blood*; D006801:Humans; D008875:Middle Aged
chemical_list: D000941:Antigens; D006632:Histamine