Correlations of the surface μ chain mature-immature ratios with prognostic markers. The graphs show the association between surface μ chain glycoforms ratio and (A) VH gene mutational status, (B) ZAP-70 expression, and (C) CD38 expression. Horizontal bars indicate mean values. Statistically significant differences between the groups are shown (t test, 2-tailed, unpaired, 99% CI).