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2. The seventh annual air medical program survey,1991
3. Is the flight physician needed for helicopter emergency medical services?;Rhee;Ann Emerg Med,1986
4. Physician presence on a helicopter emergency medical service: Necessary or desirable?;Snow;Aviat Space Environ Med,1986
5. The impact of a physician as part of the air medical prehospital team in patients with blunt trauma;Baxt;JAMA,1987