Complement C4 is a marker for adult rheumatoid arthritis.
D000328:Adult; D001172:Arthritis, Rheumatoid / Q000175:diagnosis* / Q000276:immunology; D001315:Australia; D003181:Complement C4 / Q000032:analysis*; D006680:HLA Antigens; D006801:Humans; D011110:Polymorphism, Genetic
D003181:Complement C4; D006680:HLA Antigens