title: Young at heart.
authors: L
authors: L
authors: Wallis
mesh_terms: D000368:Aged / Q000523:psychology*; D002656:Child Day Care Centers / Q000458:organization & administration*; D002675:Child, Preschool; D006801:Humans; D007398:Interpersonal Relations; D009735:Nursing Homes / Q000458:organization & administration*; D002666:Psychology, Child