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. 2011 Oct 12;6(10):e25636. doi: 10.1371/journal.pone.0025636

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Thang 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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Number of colonies in fibroblasts (NIH3T3; A), immortalized nontumorigenic melanocytes (melan-a; B), cutaneous squamous cell carcinoma cells [HSC5 (C) and A431 (D)] and malignant melanoma cells (Mel-ret; E) treated with 0–100 µM (lanes 1–7) of barium in the colony formation assay are presented. **, Significantly different (p<0.01) from the control by the Kruskal-Wallis test.