1. Unit of Occupational Prevention and Protection ASL Lecce Lecce Italy
2. Department of Public Health and Infectious Diseases Sapienza University of Rome Rome Italy
3. Azienda Ospedaliero Universitaria Policlinico Umberto I Rome Italy
4. Department of Human Neurosciences Sapienza University of Rome Rome Italy
5. Medical Statistic and Molecular Epidemiology Unit University of Biomedical Campus Rome Italy