1. Department of Electrical and Information Engineering, Polytechnic University of Bari, Bari, Italy
2. BioRobotics Institute, Scuola Superiore Sant'Anna, Pisa, Italy
3. IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy
4. Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Azienda Ospedaliera Careggi, Florence, Italy