MALAT1 and B-cell chronic lymphocytic leukemia: We also stratified MALAT1 levels according to the IGHV mutational status (mutated -M-CLL- vs un-mutated U-CLL) and epigenetic subtypes (naïve-like -n-CLL, memory-like -m-CLL and intermediate -i-CLL-) and no significant differences were observed among the different groups (Fig. 1b and c).