1. Department of Physical Medicine & Rehabilitation, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
2. Physical Medicine and Rehabilitation, Jesse Brown VA Medical Center, Chicago, IL, USA
3. Rehabilitation Institute of Chicago, Shirley Ryan AbilityLab, Chicago, IL, USA
4. The Ken & Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA