1. Department of Public Health and Infectious Diseases, Sapienza University of Rome, P.le Aldo Moro 5, 00185 Rome, Italy
2. Department of Life, Health and Environmental Sciences, University of L’Aquila, P.le Salvatore Tommasi 1, Coppito, 67100 L’Aquila, Italy
3. Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, Italian Workers’ Compensation Authority-INAIL, Monte Porzio Catone, 00078 Rome, Italy
4. Unit of Occupational Health and Industrial Hygiene, Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Piazzale Spdali Civili 1, 25123 Brescia, Italy