1. Helsing, London, U.K.
2. Salcef Group, Rome, Italy
3. Department of Electrical, Electronic and Information Engineering, University of Bologna, Bologna, Italy
4. Biomedical Science and Technologies and Nanobiotechnology Laboratory, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
5. Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy