1. Department of Rehabilitation Medicine, Thomas Jefferson University, Philadelphia, PA 19107, USA
2. Department of Neurology, Rigshospitalet, Glostrup, DK-2600 Copenhagen, Denmark
3. Institute of System Motor Science, Center of Brain, Behavior and Metabolism, University of Lübeck, 23562 Lübeck, Germany
4. Hotel Dieu Shaver Health and Rehabilitation Centre, St. Catharines, ON L2T 4C2, Canada
5. Department of Neurology, Georgetown University, Washington, DC 20007, USA
6. Rehabilitation Associates of the Main Line, Main Line Health, Paoli, PA 19301, USA
7. Department of Physical Medicine and Rehabilitation, Rutgers New Jersey Medical School, Newark, NJ 07103, USA
8. Rehabilitation Medicine, UT Health San Antonio, San Antonio, TX 78229, USA
9. Department of Medicine, University of British Columbia, Vancouver, BC V5Z 2G9, Canada