1. Biomedical and Neuromotorial Science Department, University of Bologna, Italy
2. Biomedical and Neuromotorial Science Department, University of Bologna, Italy, Clinic of Orthopaedic and Traumatology, Istituto Ortopedico Rizzoli, Bologna, Italy
3. Clinic of Orthopaedic and Traumatology, Istituto Ortopedico Rizzoli, Bologna, Italy