1. Department of Finance and Business Economics, University of Southern California, Los Angeles, CA 90089
2. Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA 90089
3. Schaeffer Center for Health Policy & Economic, University of Southern California, Los Angeles, CA 90089
4. Goldman School of Public Policy, University of California, Berkeley 94720
5. Contra Costa Regional Medical Center Health Centers, Contra Costa Health Services, Martinez, CA 94553