Mitogenic effect of UWBR on HGM-treated AML-12 mouse hepatocytes. HGM-treated AML-12 mouse hepatocytes were exposed to UWB pulses for 2 h at a temp of 23°C, pulse width of 10 ns, repetition rate of 1 kHz, and applied field strength of 5–20 kV/m. Cell viability was assessed following a post-exposure incubation period of 8–24 h. In this assay, viable cells converted MTT to a water-insoluble formazan dye, as indicated in the methodology section. Bars are means ± SDs, n=3. *Significantly different from control, p ≤ 0.05.