Fig. 4From: Photobiological modulation of hepatoma cell lines and hepatitis B subviral particles secretion in response to 650 nm low level laser treatmentThe survival rate of HepG2 cells and comparisons of the cell viability percentages between non-irradiated (A) and irradiated (B, C, D, and E) groups after 48 h incubation post-laser irradiation using MTT Assay. On the bar columns, significant differences between control (A) and their respective experimental groups are donated by (***) = P < 0.001Back to article page