Figure 3: The effects of low-power He-Ne laser irradiation on cell mobility were assessed by wound healing assay. The numbers of (A) A549 and (B) H1299 cells migrated into the cell-free zone after 4.0 mW He-Ne laser irradiations for various time courses were evaluated at indicated time intervals after scratch wounding. The triplicated experiments were conducted independently and the data shown as the mean ± SD. *P<0.05, compared with the untreated control group.