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. 2022 Sep 28;23(19):11462. doi: 10.3390/ijms231911462

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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The size distribution of micelles before lyophilization: from polyDBB_PEG_COOH_40 (A), polyDBB_PEG_COOH_60 (B) polyDBB_PEG_COOH_80 (C); after lyophilization: from polyDBB_PEG_COOH_40 (D), polyDBB_PEG_COOH_60 (E), polyDBB_PEG_COOH_80 (F) and their morphologies after lyophilization (G–I) characterized by SEM.