title: Hypocomplementemia in procainamide-associated systemic lupus erythematosus.
mesh_terms: D000906:Antibodies; D003165:Complement System Proteins / Q000378:metabolism*; D004247:DNA; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000139:chemically induced / Q000276:immunology / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D011342:Procainamide / Q000009:adverse effects*
chemical_list: D000906:Antibodies; D003165:Complement System Proteins; D004247:DNA; D011342:Procainamide