P1003: PERIPHERAL BLOOD CYTOTOXIC T CELLS SHOW EARLY EXHAUSTED FEATURES IN MYELOFIBROSIS PATIENTS. (23rd June 2022) - Tavernari, L.; Rontauroli, S.; Maccaferri, M.; Mora, B.; Bianchi, E.; Parenti, S.; Genovese, E.; Guglielmelli, P.; Carretta, C.; Mallia, S.; Mirabile, M.; Sartini, S.; et al.