SF3B1 and B-cell chronic lymphocytic leukemia: Comparing our data with those obtained previously from other cohorts, it should be noted that for CLL#3 subgroup, our data is in a good compliance with that published by Sutton et al. Furthermore, there is a partial match for CLL#1 subgroup in SF3B1 and TP53 gene mutation data and for CLL#7H subgroup—in NOTCH1 and SF3B1 gene mutation data [20].