[1] Univ Calif Los Angeles, David Geffen Sch Med, Dept Emergency Med, 1100 Glendon Ave,Suite 1200, Los Angeles, CA 90024 USA
[2] Univ Calif Los Angeles, David Geffen Sch Med, Dept Family Med, Los Angeles, CA USA
[3] Univ Calif Los Angeles, David Geffen Sch Med, Div Infect Dis, Los Angeles, CA USA
[4] CA Bridge, Publ Hlth Inst, Oakland, CA USA
[5] RAND Corp, Santa Monica, CA USA
[6] Univ Calif Los Angeles, Dept Psychiat & Biobehav Sci, Los Angeles, CA USA
[7] Marshall Med Ctr, Placerville, CA USA