[1] Univ Maryland, Sch Med, Baltimore, MD 21201 USA
[2] Univ Maryland, Res Associate Program Emergency Med & Crit Care, Sch Med, Baltimore, MD USA
[3] Univ Illinois, Carle Illinois Coll Med, Urbana, IL USA
[4] Univ Maryland, Crit Care Resuscitat Unit, Med Ctr, 22 South Greene St,Suite T3N45, Baltimore, MD 21201 USA
[5] Univ Maryland, Sch Med, Dept Emergency Med, 22 South Greene St,Suite T3N45, Baltimore, MD 21201 USA
[6] Univ Maryland, Sch Med, R Adams Cowley Shock Trauma Ctr, 22 South Greene St,Suite T3N45, Baltimore, MD 21201 USA