1. Center for the Study of Healthcare Provider Behavior, VA Greater Los Angeles Healthcare System, CA, USA
2. RAND Corporation, Santa Monica, CA, USA
3. UCLA School of Public Health, Los Angeles, CA, USA
4. California State University, Long Beach, School of Nursing, Long Beach, CA, USA
5. Veterans Administration Greater Los Angeles Healthcare System, Los Angeles, CA, USA
6. Veterans Administration Palo Alto Healthcare System, Palo Alto, CA, USA
7. Stanford University School of Medicine, Palo Alto, CA, USA
8. Geffen School of Medicine at UCLA, Los Angeles, CA, USA