Funding for this research was provided by:
National Natural Science Foundation of China (11775169)
the Natural Science Foundation of Hebei Province (A2018208171)
Received: 8 January 2020
Accepted: 6 October 2020
First Online: 15 October 2020
Ethics approval and consent to participate
: All analyses were based on previous published studies, thus no ethical approval and patient consent are required.
: The authors declare that they have no competing interests.
: Written informed consent for publication was obtained from all participants.