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Authors
Cheng, Xiao-Kang https://orcid.org/0000-0002-9709-2428
Bian, Fu-Cheng
Liu, Zhao-Yu
Yang, Feng-Kai
Chen, Bin https://orcid.org/0000-0003-3275-7166
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Funding
Funding for this research was provided by:
Department of Health of Hebei Province (20150019)
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Article History
Received: 17 May 2020
Accepted: 23 October 2020
First Online: 3 November 2020
Ethics approval and consent to participate
: This research was approved by the ethics committee of Chengde Medical University Affiliated Hospital. All participants agreed with the data and publication of the manuscript.
: Written informed consent was obtained from all participants.
: The authors declare that they have no competing interests.
