title: Circulating immune complexes in ankylosing spondylitis detected by the polyethylene glycol test.
mesh_terms: D000328:Adult; D000368:Aged; D000936:Antigen-Antibody Complex / Q000302:isolation & purification*; D005260:Female; D006801:Humans; D007136:Immunoglobulins / Q000032:analysis; D008297:Male; D008875:Middle Aged; D011092:Polyethylene Glycols; D013167:Spondylitis, Ankylosing / Q000276:immunology*
chemical_list: D000936:Antigen-Antibody Complex; D007136:Immunoglobulins; D011092:Polyethylene Glycols