1 Center for Vulnerable Populations, University of California, San Francisco, San Francisco, CA, USA; UCSF Benioff Homelessness and Housing Initiative at Zuckerberg San Francisco General Hospital and Trauma Center, San Francisco, CA 94110, USA.
2 Center for Vulnerable Populations, University of California, San Francisco, San Francisco, CA, USA; UCSF Benioff Homelessness and Housing Initiative at Zuckerberg San Francisco General Hospital and Trauma Center, San Francisco, CA 94110, USA. Electronic address: margot.kushel@ucsf.edu.