P982: MYELOID-DERIVED SUPPRESSOR CELLS: CHARACTERIZATION IN PERIPHERAL BLOOD AND SPLEEN TISSUE OF PATIENTS WITH MYELOFIBROSIS. (23rd June 2022) - Campanelli, R.; Bonometti, A.; Massa, M.; Abbà, C.; Villani, L.; Carolei, A.; Catarsi, P.; Paulli, M.; Barosi, G.; Boveri, E.; Rosti, V.