1. Department of Medicine University of California San Diego CA USA
2. Department of Medicine VA San Diego Healthcare System San Diego CA USA
3. Department of Geriatrics Geffen School of Medicine at UCLA Los Angeles CA USA
4. Department of Rheumatology Inje University Ilsan Paik Hospital Goyang South Korea
5. Research Institute California Pacific Medical Center Research Institute, and Department of Epidemiology and Biostatistics, University of San Francisco San Francisco CA USA
6. Geriatric Research Education and Clinical Center Veterans Affairs Health Care System Minneapolis MN USA
7. Department of Medicine University of Minnesota Minneapolis MN USA
8. HealthPartners Institute and Park Nicollet Clinic Health Partners Inc Minneapolis MN USA
9. Division of Health Policy and Management University of Minnesota Minneapolis MN USA
10. Department of Family Medicine and Public Health University of California San Diego CA USA