1. Department of Medicine, University of California, San Diego Health, San Diego
2. School of Medicine, University of California, San Diego
3. RTI International–University of North Carolina at Chapel Hill Evidence-based Practice Center, RTI International, Research Triangle Park
4. University of California, San Francisco Social Intervention Research and Evaluation Network, San Francisco
5. School of Medicine, Department of Family and Community Medicine, Center for Health and Community, University of California, San Francisco
6. Section of General Internal Medicine, MacLean Center for Clinical Medical Ethics, Center for the Study of Race, Politics and Culture, The University of Chicago, Chicago, Illinois