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Authors
Yang, Yang
Hao, Wang http://orcid.org/0000-0002-3484-299X
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Article History
Received: 3 July 2019
Accepted: 11 December 2019
First Online: 27 December 2019
Ethics approval and consent to participate
: This study is retrospective and did not require the ethical approval.
: The patients had provided their consent for publication.
: The authors declare that they have no competing interests.
