title: Helicopter emergency medical service.
authors: E
authors: E
authors: Skogvoll
authors: T
authors: T
authors: Rygnestad
mesh_terms: D017732:Air Ambulances; D006801:Humans; D009203:Myocardial Infarction / Q000628:therapy; D009664:Norway; D019057:Quality-Adjusted Life Years; D019035:Rural Health Services; D013997:Time Factors