1. Center for Population Health Sciences, Department of Medicine, Stanford University, Palo Alto, CA
2. Center for Primary Care and Outcomes Research, Department of Health Research and Policy, Stanford University, Stanford, CA
3. Department of Social and Behavioral Sciences, Harvard T.H. Chan School of Public Health, Boston, MA
4. Center for Primary Care, Harvard Medical School, Boston, MA
5. Department of Epidemiology, School of Public Health, University of California, Berkeley, Berkeley, CA
6. Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA