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Effect of laser light irradiation on cell survival. Overall effect of MOD1 and MOD2 laser light irradiation on cell survival as evaluated by MTT test are illustrated in the figure, where A refers to short (20 sec) and B refers to long (15 min) irradiation. Short laser irradiation using both MOD1 and MOD2 slightly but significantly protects cell culture viability, whereas long laser exposure has no protective effect. Statistical analysis: one-way ANOVA and post-hoc test, *p < 0.05.
