Columbia subject headings:
Geriatrics--United States.
Life support systems (Critical care)--Technological innovations--United States.
Life support systems (Critical care)--United States.
Older people--Medical care--Technological innovations--United States.
Older people--Medical care--United States.
Harvard subject headings:
Geriatrics--United States.
Life support systems (Critical care)--United States.
Older people--Medical care--United States
Princeton subject headings:
Geriatrics--United States.
Life support systems (Critical care)--United States.
Older people--Medical care--United States.