1. Center for the Study of Healthcare Innovation, Implementation and Policy, VA Greater Los Angeles Healthcare System, Los Angeles, California, USA.
2. Veterans Emergency Management Evaluation Center, Office of Patient Care Services, North Hills, California, USA.
3. Center for Healthcare Organization and Implementation Research, VA Boston Healthcare System, Boston, Massachusetts, USA.
4. VA Center of Innovation (COIN) for Veteran-Centered and Value-Driven Care, VA Puget Sound Healthcare System, Seattle, Washington, USA.
5. Department of Health Systems and Population Health, School of Public Health, University of Washington, Seattle, Washington, USA.
6. Department of Medicine and Department of Health Policy and Management, University of California Los Angeles, Los Angeles, California, USA.