1. The BioRobotics Institute, Scuola Superiore Sant’Anna, Pisa 56025, Italy.
2. Translational Neural Engineering Laboratory, Center for Neuroprosthetics and Institute of Bioengineering, School of Engineering, Ecole Polytechnique Federale de Lausanne, Lausanne CH-1015, Switzerland.
3. Laboratory of Biomedical Robotics and Biomicrosystems, Campus Bio-Medico University, Rome 00128, Italy.
4. IRCCS San Raffaele Pisana, Rome 00163, Italy.
5. Institute of Neurology, Campus Bio-Medico University, Rome 00128, Italy.
6. Laboratory for Biomedical Microtechnology, Department of Microsystems Engineering–IMTEK, University of Freiburg, Freiburg D-79110, Germany.
7. Department of Geriatrics, Neurosciences and Orthopedics, Catholic University of the Sacred Heart, Rome 00168, Italy.
8. School of Computer Science and Electronic Engineering, University of Essex, Colchester C043SQ, UK.
9. Center for Sensory-Motor Interaction, Department of Health Science and Technology, Aalborg University, Aalborg DK-9100, Denmark.