[1] Amer Univ Beirut, Med Ctr, Dept Emergency Med, Beirut, Lebanon
[2] Johns Hopkins Med Inst, Dept Pharm, Baltimore, MD 21205 USA
[3] Johns Hopkins Med Inst, Dept Anesthesiol & Crit Care Med, Baltimore, MD 21205 USA
[4] Franklin Sq Hosp Ctr, Dept Emergency Med, Baltimore, MD USA
[5] Johns Hopkins Univ, Carey Sch Business, Baltimore, MD USA
[6] Johns Hopkins Univ, Sch Med, Baltimore, MD USA