1. Clinical Infectious Diseases, Fondazione Policlinico Tor Vergata University Hospital, Rome, Italy;
2. Istituto Superiore di Sanità, Rome, Italy;
3. Clinical Microbiology Laboratories, Fondazione Policlinico Tor Vergata University Hospital, Rome, Italy;
4. Haematology Department, Fondazione Policlinico Tor Vergata University Hospital, Rome, Italy