1. Department of Veterans Affairs, Center for Healthcare Organization and Implementation Research, Boston, MA, USA
2. Department of Veterans Affairs, VISN 17 Center of Excellence for Research on Returning Veterans, Waco, TX, USA
3. Department of Health Policy and Management, School of Public Health, Texas A&M University, College Station, TX, USA
4. Department of Health Policy, Law, and Management, School of Public Health, Boston University, Boston, MA, USA
5. School of Medicine, Tufts University, Boston, MA, USA