title: Serum zinc and copper levels in rheumatoid arthritis.
mesh_terms: D000368:Aged; D001172:Arthritis, Rheumatoid / Q000097:blood*; D003300:Copper / Q000097:blood*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015032:Zinc / Q000097:blood*
chemical_list: D003300:Copper; D015032:Zinc