1. Department of Physical Medicine and Rehabilitation, Vagelos College of Physicians and Surgeons, Columbia University Medical Center, New York, NY, USA
2. Department of Mechanical Engineering, Columbia University, New York, NY, USA
3. Department of Neurology, Vagelos College of Physicians and Surgeons, Columbia University Medical Center, New York, NY, USA
4. Department of Biostatistics, Vagelos College of Physicians and Surgeons, Columbia University Medical Center, New York, NY, USA
5. Department of Rehabilitation Medicine, Weill Cornell Medical College, Cornell University, New York, NY, USA
6. Department of Rehabilitation and Regenerative Medicine, Vagelos College of Physicians and Surgeons, Columbia University
7. NewYork-Presbyterian Hospital, New York, NY, USA