title: Rheumatoid arthritis: an unrecognised cause of pseudohyperkalaemia.
mesh_terms: D000368:Aged; D001172:Arthritis, Rheumatoid / Q000097:blood / Q000150:complications*; D005260:Female; D006801:Humans; D006947:Hyperkalemia / Q000097:blood / Q000209:etiology*; D010976:Platelet Count