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. 2021 Jun 11;9:657584. doi: 10.3389/fbioe.2021.657584

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Copyright © 2021 Zhang, Wu, Li, Wang, Lu and Wong.

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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Inflammation, repair, and remodeling stages are three main stages in rotator cuff repair. All kinds of growth factors play an important role in the repair process (Gulotta and Rodeo, 2009).