1. Department of Infectious Diseases, Istituto Superiore di Sanità, Rome, Italy
2. Unit of Microbiology, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
3. Health Protection Agency of Milan, Milan, Italy
4. Directorate General for Health, Lombardy Region, Milan, Italy
5. Chief Medical Laboratory of Clinical Chemistry and Microbiology, ASST Melegnano and Martesana, Milan, Italy
6. Laboratory of Microbiology, Fondazione IRCCS Ca' Granda-Ospedale Maggiore Policlinico, Milan, Italy
7. Department of Cardiovascular, Endocrine-metabolic Diseases and Aging, Istituto Superiore di Sanità, Rome, Italy
8. Health Protection Agency of Bergamo, Bergamo, Italy
9. Scientific Departement, Army Medical Center, Rome, Italy
10. Directorate General of Health Prevention, Ministry of Health, Rome, Italy