title: Immunologic study of chronic bronchitis.
mesh_terms: D000974:Antibodies, Antinuclear / Q000032:analysis; D001991:Bronchitis / Q000276:immunology*; D003165:Complement System Proteins / Q000032:analysis; D006801:Humans; D007136:Immunoglobulins / Q000032:analysis; D012217:Rheumatoid Factor / Q000032:analysis; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D000974:Antibodies, Antinuclear; D007136:Immunoglobulins; D003165:Complement System Proteins; D012217:Rheumatoid Factor