1. Psychology, University e-Campus, Novedrate, Italy
2. Department of Orthopaedics abd Traumatology, University of Rome "Tor Vergata", Rome, Italy
3. Department of Physical and Rehanilitation Medicine, University of Padua, Italy
4. Department of Musculoskeletal Disorders, University of Salerno, Italy; Queen Mary University of London, Barts and The London School of Medicine and Dentistry, Mile End Hospital, London, England; Institute of Science and Technology in Medicine, Keele University School of Medicine, Stoke on Trent, England