1. Division of Infectious Diseases I, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
2. Department of Hygiene and Preventive Medicine, Health Protection Agency of Pavia, Pavia, Italy
3. Directorate General for Health, Lombardy Region, Milano, Italy
4. Department of Clinical, Surgical, Diagnostic, and Pediatric Sciences, University of Pavia, Pavia, Italy
5. Molecular Virology Unit, Microbiology and Virology Department, Pavia, Italy
6. Anesthesia, Intensive Care and Pain Therapy, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
7. Anesthesia and Intensive Care, Emergency Department, Fondazione IRCCS Policlinico S. Matteo, Pavia, Italy
8. Department of Internal Medicine and Therapeutics, University of Pavia, Pavia, Italy
9. Emergency Department, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy