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. 2017 Jan 3;12(1):e0168937. doi: 10.1371/journal.pone.0168937

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© 2017 Shingyochi 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 credited.

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Fig 2 — HDF proliferation was determined by the MTS assay after irradiation with LLLT (0.1, 0.5, 1.0, 2.0, or 5.0 J/cm²). The non-irradiated group served as the control. Results are expressed as the mean ± SD of three independent experiments. **p<0.01, ***p<0.001 compared with the non-irradiated group (Tukey-Kramer test).