1. Department of Medicine Surgery and Neurosciences, University of Siena, Siena, Italy
2. Section of Orthopedics, Azienda Ospedaliero-Universitaria Senese, Policlinico Santa Maria alle Scotte, Siena, Italy
3. Azienda USL della Romagna, Ospedale Santa Maria delle Croci, Ravenna, Italy
4. Second Clinic of Orthopedic and Traumatology, University of Pisa, Pisa, Italy
5. Section of Orthopedic Oncology and Reconstructive Surgery, Azienda Ospedaliero-Universitaria Careggi, Firenze, Italy
6. Section of Internal Medicine, Azienda Ospedaliero-Universitaria Senese, Policlinico Santa Maria alle Scotte, Siena, Italy