1. North‐Western Tuscany Blood Bank Pisa University Hospital Pisa Italy
2. Department of Anesthesiology and Perioperative Medicine Mayo Clinic Rochester Minnesota USA
3. Department of Molecular Microbiology and Immunology Johns Hopkins Bloomberg School of Public Health Baltimore Maryland USA
4. Department of Pathology Johns Hopkins University School of medicine Baltimore Maryland USA
5. Division of Hematology and Transfusion Medicine Carlo Poma Hospital Mantua Italy