title: Laboratory features of pleural effusions.
mesh_terms: D000936:Antigen-Antibody Complex; D001172:Arthritis, Rheumatoid / Q000150:complications / Q000276:immunology; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000150:complications / Q000276:immunology; D010996:Pleural Effusion / Q000175:diagnosis / Q000209:etiology*
chemical_list: D000936:Antigen-Antibody Complex