1. Physical Therapy Program; Midwestern University; Downers Grove Illinois USA
2. Department of Preventive Medicine; Rush University Medical Center; Chicago Illinois USA
3. Department of Applied Physiology and Kinesiology; University of Florida; Gainesville Florida USA
4. Department of Neurological Sciences; Rush University Medical Center; Chicago Illinois USA
5. Department of Kinesiology and Nutrition; University of Illinois at Chicago; Chicago Illinois USA
6. Parkinson's Disease and Movement Disorders Center; Northwestern University; Chicago Illinois USA
7. Department of Radiology; University of Illinois at Chicago; Chicago Illinois USA
8. Department of Bioengineering; University of Illinois at Chicago; Chicago Illinois USA
9. Center for MR Research; University of Illinois at Chicago; Chicago Illinois USA
10. Rush Alzheimer's Disease Center; Rush University Medical Center; Chicago Illinois USA
11. Department of Psychology; University of Illinois at Chicago; Chicago Illinois USA
12. Department of Neurology; University of Florida; Gainesville Florida USA
13. Department of Biomedical Engineering; University of Florida; Gainesville Florida USA