P1222: ANTIGEN-INDEPENDENT, CELL-AUTONOMOUS SIGNALING IN SPLENIC MARGINAL ZONE LYMPHOMA - Anastasia Iatrou; Palash C Maity; Alexandra Theresa Linder; Andreas Agathangelidis; Michela Frenquelli; Raphael Sandaltzopoulos; Massimo Degano; Anastasia Chatzidimitriou; Paolo Ghia; Hassan Jumaa; Kostas Stamatopoulos (HemaSphere, 2023)