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Authors
Sun, Lin
Yang, Ying
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Article History
Received: 24 October 2019
Accepted: 27 January 2020
First Online: 9 March 2020
Compliance with ethical guidelines
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: L. Sun and Y. Yang declare that they have no competing interests.
: All procedures performed in studies involving human participants or on human tissue were in accordance with the ethical standards of the institutional and/or national research committee and with the 1975 Helsinki declaration and its later amendments or comparable ethical standards and approved by the ethics committee of our hospital. Informed consent was obtained from all individual participants included in the study.
