1. Hematology and Bone Marrow Transplantation Unit Azienda Socio‐Sanitaria Territoriale Papa Giovanni XXIII Bergamo Italy
2. Department of Oncology‐Hematology Universita` degli Studi di Milano Milan Italy
3. Hematology and Clinical Immunology Unit Universita` degli Studi di Padova Padua Italy
4. Department of Pathology Università degli Studi di Padova Padua Italy
5. Oncological Immunology and Molecular DiagnosticIstituto Oncologico Veneto Padua Italy