1. VA HSR&D Center for Care Delivery and Outcomes Research, Minneapolis VA Health Care System, Minneapolis, Minnesota, USA.
2. Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota, USA.
3. VA HSR&D Center for the Study of Healthcare Innovation, Implementation & Policy, VA Greater Los Angeles Healthcare System, Los Angeles, California, USA.
4. VA Informatics and Computing Infrastructure (VINCI), VA Salt Lake City Healthcare System, Salt Lake City, Utah, USA.
5. Department of Health Policy and Management, UCLA Fielding School of Public Health, Los Angeles, California, USA.
6. Department of Medicine, UCLA Geffen School of Medicine, Los Angeles, California, USA.