Telomere length distribution in relation to established prognostic factors. (A) Telomere length versus stage. (B) Telomere length versus CD38 expression. (C) Telomere length versus ZAP-70 expression. (D) Telomere length versus IGHV mutation status. The boxes shown present median value and interquartile range, and the whiskers minimum and maximal values, except for outliers.