title: Antigen-specific suppressor cell activity in procainamide therapy.
mesh_terms: D000368:Aged; D000974:Antibodies, Antinuclear / Q000276:immunology; D000939:Epitopes / Q000276:immunology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011342:Procainamide / Q000009:adverse effects*; D050378:T-Lymphocytes, Regulatory / Q000187:drug effects*
chemical_list: D000974:Antibodies, Antinuclear; D000939:Epitopes; D011342:Procainamide