P22: A NON-INTERVENTIONAL, PROSPECTIVE, OBSERVATIONAL STUDY OF RELAPSED/REFRACTORY MULTIPLE MYELOMA PATIENTS TREATED WITH IXAZOMIB IN REAL-WORLD SETTINGS IN GREECE; INTERIM RESULTS... oleh E Katodritou, MC Kyrtsonis, S Delimpasi, E Spanoudakis, G Vassilopoulos, P Zikos, N Viniou, G Kaiafa, M Papathanasiou, V Pappa, E Michalis, I Adamopoulos, K Kokoviadou, G Tsirakis, C Poziopoulos, E Terpos