Columbia subject headings:
Health maintenance organizations--Illinois--Chicago.
Health maintenance organizations--Minnesota--Minneapolis.
Health maintenance organizations--Minnesota--Saint Paul.
Health maintenance organizations.
Harvard subject headings:
Health maintenance organizations
Health maintenance organizations--Illinois--Chicago.
Health maintenance organizations--Minnesota--Minneapolis.
Health maintenance organizations--Minnesota--Saint Paul.
Princeton subject headings:
Health maintenance organizations--Illinois--Chicago.
Health maintenance organizations--Minnesota--Minneapolis.
Health maintenance organizations--Minnesota--Saint Paul.
Health maintenance organizations.