P841: EXTRACELLULAR VESICLE PROTEINS AS BIOMARKER OF OUTCOME IN MULTIPLE MYELOMA - A REAL-WORLD STUDY. (23rd June 2022) - Arnault Carneiro, E.; Ferreira, B.; Pestana, C.; Barahona, F.; Caetano, J.; Lopes, R.; Lúcio, P.; Neves, M.; Beck, H. C.; Carvalho, A. S.; Matthiesen, R.; Costa-Silva, B.; et al.