1. UCSF National Clinician Scholars Program, Philip R. Lee Institute for Health Policy Studies, University of California San Francisco, San Francisco, California, USA
2. San Francisco Veterans Affairs Medical Center, San Francisco, California, USA
3. UCSF Center for Vulnerable Populations, San Francisco General Hospital, San Francisco, California, USA
4. Department of Humanities and Social Sciences, University of California San Francisco, San Francisco, California, USA
5. Department of Family and Community Medicine, University of California, Davis, California, USA