Natural helping among older adults.
D000368:Aged / Q000523:psychology*; D003710:Demography; D005260:Female; D006379:Helping Behavior; D006801:Humans; D007398:Interpersonal Relations; D008297:Male; D008960:Models, Psychological; D010551:Personality; D012648:Self Care / Q000523:psychology; D012919:Social Behavior; D012931:Social Environment; D012944:Social Support; D014838:Volunteers