1. Department of Infectious and Tropical Diseases; University of Brescia and Brescia Spedali Civili Hospital; Brescia Italy
2. Unit of Infectious Diseases; Department of Medical Sciences; University of Torino; Torino Italy
3. Department of Infectious Diseases; Ospedale Luigi Sacco; University of Milan; Milan Italy
4. Department of Internal Medicine, Geriatrics and Nephrologic Diseases; Section of Infectious Diseases; S. Orsola-Malpighi Hospital; “Alma Mater Studiorum” University of Bologna; Bologna Italy
5. Department of Infectious Diseases; EO Ospedali Galliera; Genova Italy
6. Unit of Haematology; Spedali Civili; Brescia Italy
7. Unit of Infectious Diseases; Carlo Poma Hospital; Mantova Italy
8. Unit of Haematology; Department of Oncology; University of Torino; Torino Italy