1. The Biorobotics Institute Viale Rinaldo Piaggio 34 56025 Pontedera Italy
2. Bertarelli Foundation Chair in Translational NeuroengineeringCentre for Neuroprosthetics and Institute of BioengineeringSchool of EngineeringEcole Polytechnique Federale de Lausanne (EPFL) Lausanne CH‐1202 Switzerland