[1] Univ Massachusetts, Med Sch Baystate, Dept Emergency Med, Springfield, MA 01103 USA
[2] Univ Massachusetts, Med Sch Baystate, Inst Healthcare Delivery & Populat Sci, Springfield, MA 01103 USA
[3] Univ Massachusetts, Med Sch Baystate, Off Res & Epidemiol Biostat Res Core, Springfield, MA USA
[4] Univ Calif San Francisco, Zuckerberg San Francisco Gen Hosp, San Francisco, CA 94143 USA
[5] RAND Corp, Santa Monica, CA USA
[6] New York Inst Technol, Coll Osteopath Med, Old Westbury, NY USA
[7] Univ Calif San Francisco, Dept Emergency Med, San Francisco, CA 94143 USA
[8] Georgetown Univ, Sch Med, Washington, DC USA
[9] Icahn Sch Med Mt Sinai, Dept Emergency Med, New York, NY 10029 USA
[10] Harbor UCLA, Dept Surg, Los Angeles, CA USA