S192: SINGLE-CELL RNA PROFILING OF MYELOFIBROSIS PATIENTS REVEALS PELABRESIB-INDUCED DECREASE OF MEGAKARYOCYTIC PROGENITORS AND NORMALIZATION OF CD4+ T CELLS IN PERIPHERAL BLOOD. (23rd June 2022) - Zavidij, O.; Haradhvala, N. J.; Meyer, R.; Cui, J.; Verstovsek, S.; Oh, S.; Mead, A.; Taverna, P.