U-CLL cases (n = 9) displayed stronger induction of CYP24A1 (FD: 4, p < 0.01) after calcitriol treatment compared to M-CLL cases (n = 7) (FD: 1.9, p < 0.05) (Figure S1B,C). This evidence concerns the gene CYP24A1 and B-cell chronic lymphocytic leukemia.