1. College of Health and Human Services, Northern Arizona University, 208 E. Pine Knoll Dr, Flagstaff, AZ 86011 (USA); and Department of Health Services, Policy, and Practices, School of Public Health, Brown University, Providence, Rhode Island
2. Department of Health Services, Policy, and Practices, School of Public Health, Brown University
3. Division of Rehabilitation Sciences, University of Texas Medical Branch, Galveston, Texas
4. School of Health and Rehabilitation Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania
5. Department of Health Services, Policy, and Practices, School of Public Health, Brown University; and Providence Veterans Affairs Medical Center, Providence, Rhode Island
6. Department of Health Services, Policy, and Practices, School of Public Health, Brown University; and Providence Veterans Affairs Medical Center