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Authors
Xu, Tingting
Zhang, Xinyi
Zhang, Shumao
Liu, Chunfeng
Fu, Wenhui
Zeng, Chengrun
Chen, Yue http://orcid.org/0000-0003-2381-4296
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Article History
Received: 3 March 2020
Accepted: 16 June 2020
First Online: 26 June 2020
Ethics approval and consent to participate
: All procedures were carried out in accordance with the principles of the Helsinki Declaration. This study was approved by the ethics committee of the Affiliated Hospital of Southwest Medical University (Luzhou, China). Because the study was retrospective, and included data from deceased patients, informed consent was waived.
: Not applicable.
: The authors declare that they have no competing interests.
