Funding for this research was provided by:
National Natural Science Foundation of China (81671676)
The Scientific Research Project of Hunan Health and Health Commission (B2019194)
Received: 5 April 2020
Accepted: 19 August 2020
First Online: 1 September 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Commission of Xiangya Hospital Central South University (approval number 202002019), which waived the written informed consent for emerging infectious diseases.
: This manuscript is approved by all authors for publication.
: We declare no competing interests.