1. Unit of Blood Diseases and Stem Cell Transplantation, University of Brescia, Brescia, Italy;
2. Institute of Hematology L. and A. Seràgnoli, S. Orsola Malpighi Hospital, University of Bologna, Bologna, Italy;
3. Ematologia 1-TMO, Ospedali Riuniti Villa Sofia-Cervello, Palermo, Italy;
4. Department of Hematology, University of Genoa, Genoa, Italy;
5. Hematology 2, ASO S. Giovanni Battista, Turin, Italy;
6. Division of Hematology, Department of Oncology and Hematology, Niguarda Ca' Granda Hospital, Milan, Italy;
7. Department of Clinical and Molecular Bio-Medicine, Section of Hematology, Oncology and General Pathology, University of Catania, Ferrarotto Hospital, Catania, Italy;
8. Department of Cellular Biotechnologies and Hematology, University “La Sapienza”, Rome, Italy;
9. Hematology Unit, “Bianchi-Melacrino-Morelli” Hospital, Reggio Calabria, Italy;
10. Division of Hematology, Ospedali Riuniti, Bergamo, Italy;
11. University of Turin, San Luigi Gonzaga Hospital, Orbassano, Turin, Italy;
12. Hematology, S. Eugenio Hospital, Rome, Italy;
13. Division of Hematology and Bone Marrow Transplantation, University of Udine, Udine, Italy;
14. Hematology, Mazzoni Hospital, Ascoli Piceno, Italy; and
15. Medical Statistics and Biometry Unit, Department of Biomedical Sciences and Biotechnologies, University of Brescia, Brescia, Italy