Funding for this research was provided by:
National Natural Science Foundation of China (71673299)
Social Science Fund Project Planning of Liaoning Province (JG16DB518)
Science and Technology Found of Shenyang (18-015-7-20)
Innovative Training program for College Students (S202010159017)
Received: 24 July 2020
Accepted: 4 January 2021
First Online: 19 January 2021
Ethics approval and consent to participate
: The study was supported and approved by Health Commission of Dalian city and Ethics Committee of China Medical University. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and national research committee and with the Helsinki declaration and its later amendments or comparable ethical standards. This manuscript adheres to the appropriate reporting guidelines and community standards for data availability.
: Not applicable.
: The authors declare that they have no conflict of interest.