[1] Drexel Univ, Dornsife Sch Publ Hlth, Dept Epidemiol & Biostat, Philadelphia, PA 19104 USA
[2] Drexel Univ, Ctr Nonviolence & Social Justice, Dornsife Sch Publ Hlth, Philadelphia, PA 19104 USA
[3] Drexel Univ, Dornsife Sch Publ Hlth, Dept Hlth Management & Policy, Philadelphia, PA 19104 USA
[4] Albert Einstein Med Ctr, Dept Emergency Med, Philadelphia, PA 19141 USA
[5] MedStar Washington Hosp Ctr, Dept Emergency Med, Washington, DC USA
[6] Temple Univ, Dept Emergency Med, Lewis Katz Sch Med, Philadelphia, PA 19122 USA
[7] Rush Univ, Dept Emergency Med, Med Ctr, Chicago, IL 60612 USA