The future of emergency care in the United States health system.
D000328:Adult; D000552:Ambulances; D002648:Child; D004189:Disaster Planning; D004632:Emergency Medical Services / Q000191:economics / Q000458:organization & administration* / Q000639:trends; D004636:Emergency Service, Hospital / Q000458:organization & administration* / Q000706:statistics & numerical data / Q000639:trends; D005544:Forecasting; D006801:Humans; D015969:National Academies of Science, Engineering, and Medicine, U.S., Health and Medicine Division; D014481:United States