P979: EXOSOMES IN POLYCYTHEMIA VERA: "MINI PLATELETS" WITH THROMBOGENIC POTENTIAL. (23rd June 2022) - Abulafia, A.; Spectre, G.; Ziv, E.; Geiger, K. R.; Sarsor, Z.; Ron, N.; Beery, E.; Revel-Vilk, S.; Naamad, M.; Raanani, P.; Uziel, O.; Rozovski, U.