P537: SAFETY AND TOLERABILITY OF AZD0466 AS MONOTHERAPY FOR PATIENTS WITH ADVANCED HEMATOLOGICAL MALIGNANCIES - PRELIMINARY RESULTS FROM AN ONGOING PHASE I/II TRIAL - Giovanni Marconi; Shukaib Arslan; Shaun Fleming; Antonio Curti; James S Blachly; Giovanni Martinelli; Matteo Giovanni Della Porta; Ashish Bajel; Tim Sauer; Martina Crysandt; Arnaud Pigneux; Marina Konopleva; et al. (HemaSphere, 2023)