| Affiliation: | 1. Anita Stewart Primary Care Research Center and Division of General Internal Medicine, San Francisco General Hospital, USA;2. Departments of Medicine, Epidemiology and Biostatistics, and Family and Community Medicine, Institute for Health Policy Studies, Division of General Internal Medicine, and Institute for Health and Aging, University of California, San Francisco, USA;3. Department of Medicine, Hennepin County Medical Center, University of Minnesota Schools of Medicine and Public Health, Minneapolis, USA;4. Robert F. Wagner Graduate School of Public Service, New York University, New York, New York, USA |
