title: Sulphasalazine induced selective IgA deficiency in rheumatoid arthritis.
mesh_terms: D000328:Adult; D001172:Arthritis, Rheumatoid / Q000188:drug therapy* / Q000276:immunology; D001799:Blood Sedimentation; D002097:C-Reactive Protein / Q000378:metabolism; D004406:Dysgammaglobulinemia / Q000139:chemically induced*; D005260:Female; D006801:Humans; D017098:IgA Deficiency; D008297:Male; D008875:Middle Aged; D012460:Sulfasalazine / Q000009:adverse effects*
chemical_list: D012460:Sulfasalazine; D002097:C-Reactive Protein