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Viability (A,C) and growth (B,D) of DPSC and INS-1 monolayer cultures, cultivated over 7 days with white- or red-light illumination; usual cultivation in the dark was conducted as control. The cell numbers (B,D) were normalized to the cell number of the respective dark control group on day one. Depicted are mean ± standard deviation, n ≥ 12 (A,C), n ≥ 3 (B,D); *p < 0.05; ***p < 0.001.
