title: Rising helicopter crash deaths spur debate over proper use of air transport.
authors.forename: Jan
authors.initials: J
authors.lastname: Greene
mesh_terms: D000060:Accidents, Aviation / Q000401:mortality / Q000517:prevention & control / Q000706:statistics & numerical data; D017732:Air Ambulances; D006077:Government Agencies; D006801:Humans; D008396:Maryland; D014481:United States