1. Department of Electronics and Telecommunications, Politecnico di Torino, Turin, Italy
2. GPEM srl, Alghero, Italy
3. Department of Orthopedics, Örebro University Hospital, Örebro, Sweden
4. Department of Orthopedics, Skaraborg Hospital Skövde, Skövde, Sweden
5. Department of Biomedical Sciences, University of Sassari, Sassari, Italy