Funding for this research was provided by:
National Institute on Disability, Independent Living, and Rehabilitation Research (Rehabilitation Engineering Research Center, ARRT)
Received: 6 April 2019
Accepted: 25 June 2020
First Online: 23 July 2020
Ethics approval and consent to participate
: Before study initiation, all investigators obtained ethical approval from Northwestern University. Informed consent was obtained from each patient before enrolment.
: All the subjects provided permission for publishing the de-identified data through signed consent.
: The authors declare that they have no competing interests.