[Sodium and potassium imbalance in the aged].
D000368:Aged; D005247:Feeding Behavior; D006801:Humans; D011188:Potassium / Q000097:blood*; D012964:Sodium / Q000097:blood*; D014883:Water-Electrolyte Imbalance / Q000097:blood*
D012964:Sodium; D011188:Potassium