1. School of Nursing, College of Health and Human Services, University of North Carolina Wilmington, Wilmington, North Carolina, USA
2. College of Public Health, University of Kentucky, Lexington, Kentucky, USA
3. Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
4. Department of Biostatistics, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
5. Department of Social Sciences and Health Policy, Division of Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
6. Department of Neurology, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
7. School of Medicine, Duke University, Durham, North Carolina, USA
8. Department of Physical Therapy, School of Health and Rehabilitation Science, University of Pittsburgh, Pittsburgh, USA