1. Department of Electronics, Information, and Bioengineering, and the WE-COBOT Laboratory, Interdepartmental Laboratory, Neuroengineering and Medical Robotics Laboratory, Politecnico di Milano, Milan, Italy
2. Center for Clinical Neuroscience, Hospital Los Madroños, Brunete, Madrid, Spain
3. Neural Rehabilitation Group, Cajal Institute, Spanish National Research Council (CSIC), Madrid, Spain
4. Villa Beretta Rehabilitation Center, Valduce Hospital, Costa Masnaga, Italy
5. Shirley Ryan AbilityLab, Chicago, IL, USA
6. Interdepartmental Laboratory, and the Department of Mechanical Engineering, WE-COBOT Laboratory, Politecnico di Milano, Milan, Italy