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. 2014 Aug 11;9(8):e104732. doi: 10.1371/journal.pone.0104732

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© 2014 Huang et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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(A) Growth curves of HaCaT cells for the sham (•) and exposed (▪) groups. The HaCaT cells were seeded and incubated for 12 h prior to ELF-EMF exposure. The results were presented as the mean ± SD fold change in the cell count relative to the initial cell count of three independent experiments. (B) Colony formation assay. In the upper panel, the bars show the colony formation of the sham and exposed cells for 144 h of ELF-EMF exposure. The results are presented as the mean ± SD of three independent experiments. In the lower panel, they were representative for sham (left) and exposed (right). The Student’s t-test was used to analyze the differences between the sham and exposure groups. *P<0.05.