[1] Hosp Univ Penn, Dept Emergency Med, PGY 4, Philadelphia, PA 19104 USA
[2] Hosp Univ Penn, Ctr Hlth Equity & Adv, 3400 Spruce St, Philadelphia, PA 19104 USA
[3] Andrew Levitt Ctr Social Emergency Med, Oakland, CA USA
[4] Univ Calif San Francisco, Dept Emergency Med, San Francisco, CA 94143 USA
[5] Stanford Sch Med, Dept Emergency Med, Palo Alto, CA USA