1. Azienda Ospedaliera Universitaria Integrata, Department
of Orthopaedics, Piazzale LA Scuro, 10, 37134
Verona, Italy.
2. Department of Public Health and Community
Medicine, University of Verona, Unit of Epidemiology
and Medical Statistics, Istituti Biologici
- Blocco B - Strada Le Grazie, 8, 37134
Verona, Italy.