1 Spinal Cord Damage Research Center, James J Peters VA Medical Center, USA; Departments of Medicine, Icahn School of Medicine at Mount Sinai, USA; Departments of Rehabilitation Medicine and Human Performance, Icahn School of Medicine at Mount Sinai, USA. Electronic address: christopher.cardozo@mssm.edu.
2 Miami Project to Cure Paralysis, USA; Department of Neurological Surgery, University of Miami Miller School of Medicine, USA; Bruce W. Carter Department of Veterans Affairs Medical Center, USA.