Funding for this research was provided by:
National Natural Science Foundation of China (81672225)
Received: 12 June 2020
Accepted: 14 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: This study was approved by the Medical Ethics Committee of Xiangya Hospital, Central South University and the Medical Ethics Committee of Changsha Central Hospital, University of South China, Changsha, Hunan, China. Informed consent was obtained in writing from all the individual participants included in the study.
: Not applicable.
: The authors declare no conflicts of interest.