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. Author manuscript; available in PMC: 2021 Mar 5.
Published in final edited form as: Photochem Photobiol. 2020 Mar 5;96(2):232–259. doi: 10.1111/php.13209

Figure 5.

Figure 5.

a) Summary of the pathways involved in targeting by cellular and tissue modulation, and b) increased PpIX accumulation with higher substrate stiffness in glioma cells (13).