title: The key-point method for EMS system appraisal: one approach to the gold standard.
authors: K S
authors: KS
authors: Baldridge
mesh_terms: D004632:Emergency Medical Services / Q000592:standards*; D006801:Humans; D010043:Outcome and Process Assessment, Health Care / Q000379:methods*; D015996:Survival Rate; D015599:Trauma Severity Indices; D014481:United States