The cytology of joint effusions in rheumatoid arthritis and ankylosing spondylitis.
D001172:Arthritis, Rheumatoid / Q000175:diagnosis*; D003581:Cytodiagnosis; D006801:Humans; D013167:Spondylitis, Ankylosing / Q000175:diagnosis*; D013582:Synovial Fluid / Q000166:cytology*