PB2204: HIGH SERUM FERRITIN AT INITIAL DIAGNOSIS IS A PREDICTOR OF BONE MARROW FIBROSIS IN PH NEGATIVE CHRONIC MYELOPROLIFERATIVE NEOPLASMS - Aldo Leone; Raffaella Reina; Martina Romano; Francesco Muriano; Giuseppe Gaeta; Raffaella Iannotta; Giuseppina Donnarumma; Italia Conversano; Serafina Barbato; Rossella Iula; Andrea Cacace; Vincenzo Martinelli; et al. (HemaSphere, 2023)