[1] Univ Med & Pharm Carol Davila, Bucharest, Romania
[2] Emergency Inst Cardiovasc Dis Prof CC Iliescu, Bucharest, Romania
[3] Duke Univ, Med Ctr, Div Cardiol, Durham, NC 27710 USA
[4] Duke Clin Res Inst, Durham, NC USA
[5] Vanderbilt Univ, Sch Med, Dept Emergency Med, Nashville, TN 37212 USA
[6] Vet Affairs Med Ctr, 50 Irving St NW, Washington, DC 20422 USA
[7] George Washington Univ, Washington, DC USA
[8] Momentum Res Inc, Durham, NC USA
[9] Indiana Univ Sch Med, Dept Emergency Med, Indianapolis, IN 46202 USA
[10] Indiana Univ Sch Med, Indianapolis EMS, Indianapolis, IN 46202 USA
[11] Univ Mississippi, Sch Med, Dept Med, Jackson, MI USA