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. 2020 Jun 22;15:4441–4452. doi: 10.2147/IJN.S246797

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© 2020 Poier et al.

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Viability of HUVEC after exposure to ZnO NPs (µg/mL). The untreated control was defined as 100%, tBHP 10 mM served as positive control (pos). The graph shows results after 1 and 3 consecutive 1-hr treatment periods and after a 24-hr regeneration period (reg).