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. 2016 Jun 8;12(2):815–824. doi: 10.3892/ol.2016.4690

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Copyright: © Zeng et al.

This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Figure 4. — DiI-retaining cells demonstrate significant resistance to irradiation and temozolomide treatment. Proliferative potentials of the DiI-retaining and DiI-negative cells in the NCH421k, NCH441 and NCH644 glioblastoma sphere lines prior to and following (A) irradiation or (B) temozolomide treatment. The data are presented as the mean ± standard deviation from three independent experiments. *P<0.05, DiI-retaining cells vs. DiI-negative cells with irradiation/temozolomide in the respective cell lines, or DiI-negative cells prior to irradiation/temozolomide vs. DiI-negative cells following irradiation/temozolomide. OD, optical density.