Columbia subject headings:
Kidneys--Calculi--Treatment--Costs.
Ultrasonic lithotripsy--Therapeutic use--Government policy--United States.
Harvard subject headings:
Extracorporeal shock wave lithotripsy--Government policy--United States.
Kidneys--Calculi--Treatment--United States--Costs.
Ultrasonic lithotripsy--Government policy--United States.
Princeton subject headings:
Extracorporeal shock wave lithotripsy--Government policy--United States.
Kidneys--Calculi--Treatment--United States--Costs.