1. The VA Collaborative Evaluation Center (VACE), Seattle, WA, Aurora, CO, Cleveland, OH, USA
2. Veterans Affairs Puget Sound Health Care System, Seattle, WA, USA
3. University of Washington, Seattle, WA, USA
4. Veterans Affairs Eastern Colorado Health Care System, Denver, CO, USA
5. Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH, USA
6. University of Colorado Anschutz, Aurora, CO, USA