Effects of the pulsed HPMs on the viabilities of the melanoma and fibroblast cells. The melanoma (G-361 and SK-Mel-31) and fibroblast (NHDF) cells were exposed to the pulsed MWs (5 and 45 shots; 0.6 J/shot). The cell viabilities were evaluated 5, 24, 48, and 72 h after the 5 and 45 shots of MW exposure; the results are compared with those for the control. (a–d), (e–h), (i–l) Viabilities of the melanoma G-361 and SK-Mel-31 and NHDF cells in the range of 5–72 h, respectively (n = 3). The significance was calculated using Microsoft Excel (MS Office 2010). The differences between the treatment groups are indicated by *P < 0.05, **P < 0.01, ***P < 0.001.