Funding for this research was provided by:
National Natural Science Foundation of China (91732303, 81671354, 91232717, 31800909, 31571149, 81171273, 31970979, 91432301)
Received: 9 January 2020
Accepted: 29 June 2020
First Online: 9 July 2020
Ethics approval and consent to participate
: All participants signed the informed consent. The study adhered to the tenets of the Declaration of Helsinki and was approved by the Biomedical Ethics Committee of Anhui Medical University.
: Not applicable.
: All authors declare no competing interests.