Evolution of the psoriatic arthritis concept and its relationship to the spondarthritides.
D001168:Arthritis / Q000175:diagnosis / Q000209:etiology / Q000235:genetics; D005787:Gene Frequency; D005819:Genetic Markers; D006680:HLA Antigens; D006801:Humans; D011565:Psoriasis / Q000175:diagnosis / Q000209:etiology / Q000235:genetics; D013166:Spondylitis / Q000209:etiology
D005819:Genetic Markers; D006680:HLA Antigens