1. Cedars-Sinai Medical Center, Los Angeles, California2RAND Corporation, Santa Monica, California
2. RAND Corporation, Santa Monica, California
3. College of Science, Virginia Tech, Blacksburg, Virginia
4. Cedars-Sinai Medical Center, Los Angeles, California4Jonathan and Karin Fielding School of Public Health, University of California, Los Angeles
5. VA Greater Los Angeles Healthcare System, Los Angeles, California
6. Cedars-Sinai Medical Center, Los Angeles, California
7. RAND Corporation, Santa Monica, California5VA Greater Los Angeles Healthcare System, Los Angeles, California