1. Research Service, VA San Diego Healthcare System (VASDHS), San Diego, CA, USA
2. Veterans Medical Research Foundation, San Diego, CA, USA
3. Department of Psychology, Penn State University, University Park, PA, USA
4. Department of Psychiatry, School of Medicine, UC San Diego, La Jolla, CA, USA
5. Center of Excellence for Stress and Mental Health, VASDHS, San Diego, CA, USA