P659: IBRUTINIB IN OVER-EIGHTIES PATIENTS WITH CHRONIC LYMPHOCYTIC LEUKEMIA: A MULTICENTER ITALIAN COHORT. (23rd June 2022) - Reda, G.; Mattiello, V.; Frustaci, A. M.; Visentin, A.; Mauro, F. R.; Innocenti, I.; Gentile, M.; Giannarelli, D.; Noto, A.; Cassin, R.; Laurenti, L.; Tedeschi, A.