Do the mutual features really dominate the separating features in rheumatoid arthritis and rheumatoid spondylitis.
D000844:Ankylosis; D001168:Arthritis; D001172:Arthritis, Rheumatoid / Q000175:diagnosis*; D003937:Diagnosis, Differential; D006801:Humans; D013166:Spondylitis; D013167:Spondylitis, Ankylosing / Q000175:diagnosis*
ARTHRITIS, RHEUMATOID/differential diagnosis; SPONDYLITIS, ANKYLOSING/differential diagnosis