1. Manual Therapy Sciences, University of Bologna, Bologna, Italy
2. Manual Therapy Sciences, University of Padova, Padova, Italy
3. Occupational Medicine Unit, S. Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
4. Health Care Service, Istituti Ortopedici Rizzoli, Bologna, Italy
5. Department of Neurological Sciences, University of Bologna, Bologna, Italy