[1] Johns Hopkins Univ, Dept Emergency Med, Baltimore, MD 21218 USA
[2] Boston Univ, Sch Med, Dept Emergency Med, Boston, MA 02118 USA
[3] NYU, Dept Emergency Med, New York, NY USA
[4] Harvard Humanitarian Initiat, Cambridge, MA USA
[5] Beth Israel Deaconess Med Ctr, Dept Emergency Med, Boston, MA 02215 USA
[6] Univ Michigan, Dept Emergency Med, Ann Arbor, MI 48109 USA
[7] George Washington Univ, Dept Emergency Med, Washington, DC USA
[8] Providence Reg Med Ctr, Dept Emergency Med, Everett, WA USA
[9] Univ Washington, Div Emergency Med, Seattle, WA 98195 USA
[10] Univ Washington, Inst Hlth Metr & Evaluat, Seattle, WA 98195 USA
[11] Rhode Isl Hosp, Dept Emergency Med, Providence, RI USA
[12] Brown Univ, Watson Inst Int Studies, Providence, RI 02912 USA
[13] Brown Univ, Dept Emergency Med, Alpert Med Sch, Providence, RI 02912 USA