P646: EFFECTIVENESS AND SAFETY OF VENETOCLAX IN COMBINATION WITH RITUXIMAB (VENR) IN R/R CLL PATIENTS WITH OR WITHOUT RISK-ASSOCIATED GENETIC MARKERS – DATA FROM THE OBSERVATIONAL VERVE STUDY. (23rd June 2022) - Schwaner, I.; Hebart, H.; Losem, C.; Wolff, T.; Famulla, K.; Huelsenbeck, J.; Schmidt, B.; Nösslinger, T.; Rossi, D.