1. Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, Illinois 60208, United States
2. Shirley Ryan AbilityLab, Chicago, Illinois 60611, United States
3. Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, Illinois 60611, United States
4. Department of Biomedical-Chemical Engineering, The Catholic University of Korea, 43 Jibong-ro, Bucheon-si, Gyeonggi-do 14662, Republic of Korea
5. Department of Biotechnology, The Catholic University of Korea, 43 Jibong-ro, Bucheon-si, Gyeonggi-do 14662, Republic of Korea
6. Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
7. Department of Physical Therapy and Human Movement Sciences, Northwestern University, Chicago, Illinois 60611, United States
8. Edward Hines Jr. VA Hospital, Hines, Illinois 60141, United States
9. Department of Neuroscience, Northwestern University, Chicago, Illinois 60611, United States
10. School of Biomedical Convergence Engineering, Pusan National University, Yangsan 50612, Republic of Korea
11. Division of Materials Science and Engineering, Hanyang University, Seoul 04763, Republic of Korea