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. 2020 Apr 30;11:558. doi: 10.3389/fphar.2020.00558

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Copyright © 2020 Lv, Li, Qian, Li, Jiang, Xiong, Xu, Lv, Liu, Chen, Tang and Xin

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The transport ratios of PEG-PSNPs and CGKRK-PSNPs (with or without borneol) across the BBB model in vitro. ^***P < 0.001, ^**P < 0.01, ^*P < 0.05 significantly lower than that of CGKRK-PSNPs with borneol.