title: Ion-selective electrodes and inaccurate serum sodium measurements.
mesh_terms: D001322:Autoanalysis; D004566:Electrodes; D006801:Humans; D007010:Hyponatremia / Q000175:diagnosis; D007019:Hypoproteinemia / Q000097:blood; D007477:Ions; D012964:Sodium / Q000097:blood*
chemical_list: D007477:Ions; D012964:Sodium