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. 2015 May 1;10(5):e0125928. doi: 10.1371/journal.pone.0125928

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© 2015 Liu 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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Fig 1 — Human HNSCC cell lines SQ20B and FaDu were cultured in complete medium and treated with different concentrations of HIV PIs (Lopinavir/Ritonavir, L/R, 0–50 μM) or Thapsigargin (TG, 50 nM) for 48h. At the end of treatment, cell viability was assessed using the CCK-8 kit according to the instructions provided by the manufacturer. Relative numbers of viable cells were calculated. (A) SQ20B; (B) FaDu. Values of each group are mean ± S.E. of six independent experiments. *** P<0.001, Statistical significance relative to control group.