1. Hematology Unit, IRCCS Ca'granda Ospedale Maggiore Policlinico and University of Milan; via Francesco Sforza, 35 Milan Italy
2. Biostatistics Unit, Regina Elena Institute for Cancer Research and Treatment; via Elio Chianesi, 53 Rome Italy
3. Division of Hematology; Dept. Of Translational Medicine; A. Avogadro University of Eastern Piedmont; Corso, Mazzini, 18 Novara Italy