Funding for this research was provided by:
Scientific and Technological Project of Xuzhou City (KC18033)
Received: 22 February 2020
Accepted: 15 January 2021
First Online: 2 February 2021
Ethics approval and consent to participate
: The study had been reviewed and approved by the Ethics Committee of Xuzhou Central Hospital (Z20180305N), and all patients had signed informed consent and agreed that their tissues would be used for clinical research.No animals are involved in this research.
: Not applicable.
: The authors declare no conflicts of interest.