P981: NEXT GENERATION SEQUENCING (NGS): AN IMPORTANT TOOL TO CHARACTERIZE MYELOPROLIFERATIVE DISEASES IN CHILDREN. (23rd June 2022) - Bianchi, S.; Palumbo, G.; Filipponi, V.; Monaco, N.; Pileggi, G.; Maglione, R.; Rousseau, M.; Moleti, M. L.; Giona, F.