1. Department of Physical Therapy, University of Nevada Las Vegas, Las Vegas, NV, USA
2. Michigan Medicine Orthotics and Prosthetics Center, University of Michigan Health, Ann Arbor, MI, USA
3. Northwestern University Prosthetics-Orthotics Center, Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, IL, USA
4. Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA
5. Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA
6. Jesse Brown VA Medical Center, Chicago, IL, USA