Funding for this research was provided by:
National Natural Science Foundation of China (81772658)
Text and Data Mining valid from 2019-11-21
Received: 20 June 2019
Accepted: 15 November 2019
First Online: 21 November 2019
Ethics approval and consent to participate
: All the specimens were obtained from the Affiliated Hospital of Xuzhou Medical University (Xuzhou, China). Written informed consent was obtained from each patient, and this study was approved by the Research Ethics Committee of the Affiliated Hospital of Xuzhou Medical University.
: Not applicable.
: The authors declare that they have no competing interests.