P760: PATTERNS OF HYPOMETHYLATING AGENT FAILURE IN PATIENTS WITH MYELODYSPLASTIC SYNDROMES. (23rd June 2022) - Chien, K.; Kim, K.; Li, Z.; Kanagal Shamanna, R.; Ong, F.; Montalban Bravo, G.; Kadia, T.; Jabbour, E.; Pemmaraju, N.; Hammond, D.; Short, N.; Ravandi, F.; et al.