The need for ALS in urban and suburban EMS systems.
Ornato
J P
JP
Racht
E M
EM
Fitch
J J
JJ
Berry
J F
JF
D004630:Emergencies; D004632:Emergency Medical Services / Q000191:economics*; D008021:Life Support Systems / Q000191:economics*; D013383:Suburban Population; D014481:United States; D014504:Urban Health