S221: BORTEZOMIB TO R-DHAP COMPARED TO R-DHAP IN RELAPSED/REFRACTORY DIFFUSE LARGE B-CELL LYMPHOMA ELIGIBLE TO STEM CELL TRANPLANTATION: FINAL RESULTS OF PHASE II RANDOMIZED FIL-VERAL12. (23rd June 2022) - Chiappella, A.; Balzarotti, M.; Botto, B; Castiglione, A.; Cavallo, F.; Usai, S. V.; Zanni, M.; Califano, C.; Re, F.; Ghiggi, C.; Olivieri, A.; Corradini, P.; et al.