title: RE: Helicopter evacuation of trauma victims in Los Angeles: does it improve survival?
authors.forename: Timothy
authors.initials: T
authors.lastname: Hardcastle
mesh_terms: D017732:Air Ambulances; D000552:Ambulances; D003627:Data Interpretation, Statistical; D006801:Humans; D015141:Los Angeles; D015983:Selection Bias; D012720:Severity of Illness Index; D016019:Survival Analysis; D014187:Transportation of Patients; D014193:Trauma Centers; D014947:Wounds and Injuries / Q000401:mortality*