Informal and formal health and social support systems of black and white elderly: a comparative cost approach.
D000368:Aged; D002908:Chronic Disease / Q000191:economics*; D003362:Cost-Benefit Analysis; D005006:Ethnicity; D005260:Female; D006299:Health Services for the Aged / Q000191:economics*; D006699:Home Care Services / Q000191:economics*; D006801:Humans; D008297:Male; D012931:Social Environment; D012944:Social Support; D014481:United States