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. 2018 Aug 20;13(8):e0202477. doi: 10.1371/journal.pone.0202477

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© 2018 Modrzynska 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 5 — Mass concentration of Ce (A) and Ti (B) in liver tissue. The concentrations were measured by ICP-MS following intratracheal instillation and oral gavage of CeO₂ and TiO₂ NPs, respectively. Data are presented as mean + SD. An asterisk (*) denotes P ≤ 0.05, (***) P ≤ 0.001, (****) P < 0.0001 of Ce or Ti mass concentration in exposed groups compared to vehicle controls. Hashtags (###) denote P < 0.001 and (####) P < 0.0001 of Ce mass concentration in intratracheally exposed group (IT) compared to orally exposed groups (PO). LOD–Limit of detection.