1. Division of General Medicine and Clinical Epidemiology, Department of Medicine, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, North Carolina
2. Cecil G. Sheps Center for Health Services Research, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
3. Research and Analytics, Collective Health, San Francisco, California
4. School of Public Health, Imperial College London, London, United Kingdom
5. Center for Primary Care, Harvard Medical School, Boston, Massachusetts
6. Department of Agricultural and Consumer Economics, University of Illinois, Urbana, Illinois
7. Departments of Medicine and Epidemiology and Biostatistics, University of California San Francisco, San Francisco, California
8. UCSF Center for Vulnerable Populations at Zuckerberg San Francisco General Hospital, San Francisco, California