Emergency medical services system research: challenges and opportunity.
Wang
Henry E
HE
Yealy
Donald M
DM
D004632:Emergency Medical Services / Q000458:organization & administration*; D006801:Humans; D038622:Internationality; D015279:Organizational Culture; D011785:Quality Assurance, Health Care / Q000379:methods; D012106:Research / Q000458:organization & administration*; D014481:United States