Letter: Zinc, penicillamine, and rheumatoid arthritis.
D001172:Arthritis, Rheumatoid / Q000188:drug therapy*; D004347:Drug Interactions; D006801:Humans; D010396:Penicillamine / Q000627:therapeutic use*; D015032:Zinc / Q000627:therapeutic use*
D010396:Penicillamine; D015032:Zinc