[1] Univ Penn, Perelman Sch Med, Dept Emergency Med, 423 Guardian Dr, 410 Blockley Hall, Philadelphia, PA 19104 USA
[2] Univ Penn, Leonard Davis Inst Hlth Econ, Philadelphia, PA 19104 USA
[3] Univ Penn, Ctr Hlth Care Transformat & Innovat, Philadelphia, PA 19104 USA
[4] Univ Penn, Perelman Sch Med, Philadelphia, PA 19104 USA
[5] Univ Penn, Ctr Hlth Justice, Penn Med, Philadelphia, PA 19104 USA