MKI67 and central nervous system cancer: The glioma growth was characterized by an increased expression of Ki67 (a marker of cell proliferation) vs. the normal brain suggesting the high proliferation of tumor cells that was similar between the GBM and GBM+Music groups (43.22 ± 8.40% vs. 0.81 ± 0.09%, p<0.001 for the GBM group and 41.44 ± 6.51% vs. 0.81 ± 0.09%, p<0.001 for the GBM+Music group, the Mann–Whitney–Wilcoxon test, n=7 in each group).