Funding for this research was provided by:
Innovative Research Group Project of the National Natural Science Foundation of China (81872714)
Natural Science Foundation of Shanxi Province (201801D221423, 2016YFC090310, YDZX20191400004850)
Received: 4 July 2020
Accepted: 18 January 2021
First Online: 30 January 2021
Ethics approval and consent to participate
: This study was reviewed and approved by the Institutional Review Board of Shanxi Medical University. All procedures performed were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Patients were informed verbally and in writing about the study and gave written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.