Funding for this research was provided by:
Hebei Province Science and Technology Support Program (zh2018001)
Received: 15 February 2021
Accepted: 18 May 2021
First Online: 25 May 2021
: The study complied with the principles of the Declaration of Helsinki, the protocol was approved by the ethics committee of Hebei General Hospital, and all the participants gave their written informed consent.
: Not applicable.
: The authors declare no conflicts of interests.