To fly or not to fly? The economics of hospital-based helicopter programs.
D000401:Aircraft / Q000191:economics*; D003284:Contract Services / Q000191:economics; D003362:Cost-Benefit Analysis; D003365:Costs and Cost Analysis; D003625:Data Collection; D004636:Emergency Service, Hospital / Q000191:economics*; D005376:Financial Management; D005377:Financial Management, Hospital; D014481:United States