1. Rehabilitation Sciences Institute, University of Toronto, Toronto, Canada;
2. Department of Medicine, University of Toronto, Toronto, Canada;
3. Department of Physiotherapy, University of Toronto, Toronto, Canada;
4. Department of Neuro-rehabilitation, Toronto Rehabilitation Institute-University Health Network, Toronto, Canada;
5. Autodesk Research, Autodesk Canada Co, Toronto, Canada;
6. Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Canada