[1] Atrium Hlth Carolinas Med Ctr, Dept Emergency Med, Charlotte, NC USA
[2] Brigham & Womens Hosp, Dept Emergency Med, Boston, MA USA
[3] Oxford Univ Hosp NHS Trust, Minist Hlth Sri Lanka, Colombo, Sri Lanka
[4] Univ Lagos, Coll Med, Lagos, Nigeria
[5] Univ Penn, Dept Emergency Med, Philadelphia, PA USA
[6] Univ South Carolina, Dept Emergency Med, Greenville, SC USA
[7] UW Hlth Univ Hosp, Madison, WI USA
[8] Beloit Mem Hosp, Madison, WI USA
[9] Brown Univ, Alpert Med Sch, Dept Emergency Med, Providence, RI USA
[10] SUNY Downstate Med Ctr, Dept Emergency Med, Brooklyn, NY USA
[11] Kings Cty Hosp Ctr, Dept Emergency Med, Brooklyn, NY USA
[12] Univ Florida, Dept Emergency Med, Jacksonville, FL 32211 USA