1. Department of Public Health, Experimental and Forensic Medicine, University of Pavia, Pavia, Italy
2. Department of Public Health and Pediatrics Sciences, University of Torino, Torino, Italy
3. Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
4. Medical Direction, IRCCS Fondazione Policlinico San Matteo, Pavia, Italy