Air ambulance services take off. But it's 'flier beware' for the customers of a confusing, lightly regulated industry.
D000068:Accreditation; D017732:Air Ambulances / Q000191:economics / Q000458:organization & administration / Q000592:standards; D003365:Costs and Cost Analysis; D006801:Humans; D007342:Insurance Benefits; D008004:Licensure; D014195:Travel