Subclasses IgG1-IgG4 in serum in ankylosing spondylitis.
D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000032:analysis*; D008297:Male; D008875:Middle Aged; D013167:Spondylitis, Ankylosing / Q000276:immunology*
D007074:Immunoglobulin G