Funding for this research was provided by:
China Postdoctoral Science Foundation (2017M613440)
Received: 3 January 2020
Accepted: 8 June 2020
First Online: 17 June 2020
Ethics approval and consent to participate
: Informed consent was obtained from all individual participants included in the study. Patient informed consent was also obtained and the procedure of human sample collection was approved by the Ethic Committee of General Hospital of Northern Theater Command.
: All authors declare no competing interests.