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. 2021 Feb 24;12:625733. doi: 10.3389/fphar.2021.625733

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Copyright © 2021 Ma, Lin, Liu, Li, He, Fang and Lin.

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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X-ray angiography of the flaps in the control, low-dose Api, and high-dose Api groups on day 7 after the operation. Api improved flap angiographic features.