Columbia subject headings:
Chronically ill--United States--States--Statistics.
People with disabilities--United States--States--Statistics.
United States--Statistics, Medical.
Harvard subject headings:
Chronically ill--United States--States--Statistics.
Health surveys--United States.
Medical care--Utilization--United States--States--Statistics.
People with disabilities--United States--States--Statistics.
United States--Statistics, Medical.
Princeton subject headings:
Chronically ill--United States--States--Statistics.
Health surveys--United States.
Medical care--Utilization--United States--States--Statistics.
People with disabilities--United States--States--Statistics.
United States--Statistics, Medical.