1. Infectious Diseases Unit, IRCCS Azienda Ospedaliero‐Universitaria di Bologna Policlinico di Sant'Orsola Bologna Italy
2. Department of Medical and Surgical Sciences Alma Mater Studiorum University of Bologna Bologna Italy
3. Department of Infectious Diseases San Raffaele Scientific Institute Milano Italy
4. Department of Hematology and Bone Marrow Transplantation Unit San Raffaele Scientific Institute Milano Italy
5. Department of Health Sciences (DISSAL) University of Genoa Genoa Italy
6. Infectious Diseases Unit IRCCS Ospedale Policlinico San Martino Genoa Italy
7. Department of Clinical Medicine and Surgery University of Naples Federico II Napoli Italy