1. RAND Corporation, Santa Monica, California.
2. Department of Health Science, California State University, Fullerton, Fullerton, California.
3. VA Greater Los Angeles Medical Center, Los Angeles, California.
4. UCLA School of Medicine, Los Angeles, California.
5. Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland.
6. VA Palo Alto Healthcare System, Palo Alto, California.
7. Stanford University School of Medicine, Palo Alto, California.
8. UCLA Fielding School of Public Health, Los Angeles, California.
9. University of California, San Francisco, California.