[1] Univ Penn, Penn Social Media & Hlth Innovat Lab, Philadelphia, PA 19104 USA
[2] Highland Hosp, Dept Emergency Med, Oakland, CA USA
[3] Univ Penn, Perelman Sch Med, Ctr Hlth Equity Res & Promot, Philadelphia VA Med Ctr,Div Gen Internal Med, Philadelphia, PA 19104 USA
[4] Univ Penn, Philadelphia VA Med Ctr, Penn Med Ctr Healthcare Innovat, Philadelphia, PA 19104 USA
[5] Univ Penn, Wharton Sch, Penn Social Media & Hlth Innovat Lab, Philadelphia, PA 19104 USA
[6] Univ Penn, Perelman Sch Med, Penn Social Media & Hlth Innovat Lab, Philadelphia, PA 19104 USA
[7] Univ Penn, Penn Med, Philadelphia, PA 19104 USA
[8] Univ Penn, Dept Emergency Med, Penn Social Media & Hlth Innovat Lab, Philadelphia, PA 19104 USA