1. Spinal Cord Injury Center, Balgrist University Hospital, Zurich, Switzerland2Wings for Life Spinal Cord Research Foundation, Salzburg, Austria
2. Department of Neurological Surgery and the Miami Project to Cure Paralysis, University of Miami/Miller School of Medicine, Miami, Florida
3. Wings for Life Spinal Cord Research Foundation, Salzburg, Austria4Spinal Cord Injury Division, Neurological Institute, the Ohio State University, Columbus