1. Department of Hematology and Transfusion Medicine, Carlo Poma Hospital, Mantua, Italy
2. Immunohaematology and Transfusion Service, Apheresis and Cell Therapy Unit, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
3. Biometry and Clinical Epidemiology Service, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
4. Molecular Virology Unit, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
5. Department of Clinical, Surgical, Diagnostic and Pediatric Sciences, University of Pavia, Pavia, Italy