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. 2021 Apr 5;28(1):700–708. doi: 10.1080/10717544.2021.1909176

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© 2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 6. — Confocal laser scanning images of oral cancer (A) CAL-27 and (B) SAS cells incubated with DOX labeled BP@PDA-PEG and BP@PDA-PAH-DMMA at different pH values of 7.4 and 6.5 after 4 h. The scale bar is 20 μm.