1. University of Pikeville Kentucky College of Osteopathic Medicine, Pikeville, KY, USA
2. University of Kentucky, Department of Physical Medicine and Rehabilitation, Lexington, KY, USA
3. University of Kentucky, Department of Biostatistics, College of Public Health, Lexington, KY, USA
4. University of Kentucky College of Health Sciences, Lexington, KY, USA
5. HealthSouth Cardinal Hill Rehabilitation Hospital, Lexington, KY, USA