Funding for this research was provided by:
National Natural Science Foundation of China (No.81500455)
the Hunan Province Development and Reform Commission Foundation (N0.2016-65)
Received: 24 December 2020
Accepted: 23 August 2021
First Online: 1 September 2021
: This study was approved by the Ethics Committee of Central South University Medical College (Reference number: S073(2013)). The study was conducted in accordance with relevant guidelines and regulations. All methods were performed in accordance with the Declaration of Helsinki. Informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.