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Authors
Xian, Wei
Xu, Xueying
Li, Junling
Sun, Jinbin
Fu, Hezi
Wu, Shaoning
Liu, Hongbo https://orcid.org/0000-0002-7404-4271
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Funding
Funding for this research was provided by:
the National Natural Science Foundation of Liaoning Province (no.2014021099)
the Social Sciences Foundation of Liaoning Province (no.L18ATJ001)
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Article History
Received: 7 July 2019
Accepted: 10 October 2019
First Online: 25 October 2019
Ethics approval and consent to participate
: Our study is a non-interventional study by a retrospective investigation. All procedures were approved by the Ethical Committee Group of China Medical University. In this study, any biomarkers or tissue was not collected, and any individual privacy was not investigated. All data in the study were elicited from insurance records in Fuxin Social Insurance Bureau. The use of the data was approved by them.
: Not applicable.
: The authors declare that they have no competing interests.
