1. Mental Illness Research Education and Clinical Center, Cpl. Michael J. Crescenz VA Medical Center, Philadelphia, Pennsylvania, USA
2. Department of Psychiatry, Perelman School of Medicine of the University of Pennsylvania, Philadelphia, Pennsylvania, USA
3. Department of Psychology, University of Arizona, Tucson, Arizona, USA
4. Mental Health, Southern Arizona VA Health Care System, Tucson, Arizona, USA
5. Health Promotion Sciences, The University of Arizona, Tucson, Arizona, USA