1. Occupational Medicine Unit, University Hospital of Verona, 37134 Verona, Italy
2. Section of Occupational Health, Department of Diagnostics and Public Health, University of Verona, 37134 Verona, Italy
3. Section of Epidemiology and Medical Statistics, Department of Diagnostics and Public Health, University of Verona, 37134 Verona, Italy
4. Unit of Forensic Medicine, Department of Diagnostics and Public Health, University of Verona, 37134 Verona, Italy