1. RAND Corporation, Santa Monica, CA, USA.
2. University of California Los Angeles, Los Angeles, CA, USA.
3. Southern California University of Health Sciences, Whittier, CA, USA.
4. Military Medical Research and Integrative Medicine, Samueli Institute, Corona Del Mar, CA, USA.
5. Department of Planning, Policy and Design, School of Social Ecology, University of California Irvine, Irvine, CA, USA.
6. Samueli Institute, Alexandria, VA, USA.
7. VA Long Beach Healthcare System, Long Beach, CA, USA.
8. Center for Health Policy Research, University of California, Irvine, CA, USA.