title: Observations on serum immunoglobulin and complement fractions in rheumatoid arthritis.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000276:immunology*; D003176:Complement C3 / Q000032:analysis; D003181:Complement C4 / Q000032:analysis; D003165:Complement System Proteins / Q000032:analysis*; D005260:Female; D006801:Humans; D007136:Immunoglobulins / Q000032:analysis*; D008297:Male; D008875:Middle Aged
chemical_list: D003176:Complement C3; D003181:Complement C4; D007136:Immunoglobulins; D003165:Complement System Proteins