Symposium on the Spondylarthritides. Clinical features of the seronegative spondylarthritides.
D003937:Diagnosis, Differential; D005260:Female; D006680:HLA Antigens / Q000032:analysis; D006801:Humans; D008297:Male; D012217:Rheumatoid Factor / Q000032:analysis; D013167:Spondylitis, Ankylosing / Q000175:diagnosis* / Q000235:genetics
D006680:HLA Antigens; D012217:Rheumatoid Factor