1 National Center for Disease Prevention and Health Promotion, Italian National Institute of Health, Rome 00161, Italy; Department of Public Health and Infectious Diseases, Sapienza University, Rome, Italy.
2 National Center for Disease Prevention and Health Promotion, Italian National Institute of Health, Rome 00161, Italy.
3 National Center for Disease Prevention and Health Promotion, Italian National Institute of Health, Rome 00161, Italy. Electronic address: [email protected].