Funding for this research was provided by:
The National Natural Science Foundation of China (81970216)
Innovative Research Group Project of the National Natural Science Foundation of China (81600237)
Excellent Youth Science Foundation of Hebei Province (H2019206536)
Received: 10 April 2021
Accepted: 10 June 2021
First Online: 28 June 2021
: The study protocol was approved by the Ethics Committee of the Second Hospital of Hebei Medical University, and written consent was obtained from each patient.
: Not applicable.
: All authors declare no competing interests.