1. North‐Western Tuscany Blood Bank Pisa University Hospital Pisa Italy
2. Division of Transfusion Medicine Carlo Poma Hospital Mantua Italy
3. Division of Infectious Diseases Departments of Medicine, Microbiology and Immunology Albert Einstein College of Medicine and Montefiore Medical Center New York City New York USA
4. Department of Medicine and Surgery University of Insubria Varese Italy
5. Laboratory of Microbiology ASST Sette Laghi Varese Italy
6. Department of Medicine Johns Hopkins School of Public Health and School of Medicine Baltimore Maryland USA