S156: INTERNATIONAL, PROSPECTIVE STUDY COMPARING NILOTINIB VERSUS IMATINIB WITH EARLY SWITCH TO NILOTINIB TO OBTAIN SUSTAINED TREATMENT-FREE REMISSION IN PATIENTS WITH WITH CHRONIC MYELOID LEUKEMIA. (23rd June 2022) - Pane, F.; Castagnetti, F.; Luciano, L.; Russo Rossi, A.; Abruzzese, E.; Bassan, R.; Binotto, G.; Caocci, G.; Cimino, G.; Fazi, P.; Gozzini, A.; Lunghi, M.; et al.