Funding for this research was provided by:
Natural Science Foundation of Liaoning Province (No. 20180530108)
Text and Data Mining valid from 2019-11-12
Received: 27 July 2019
Accepted: 25 October 2019
First Online: 12 November 2019
Ethics approval and consent to participate
: Sample collection protocols were approved by the Ethics Committee of the Fourth Affiliated Hospital of China Medical University. Written informed consent was obtained from all patients.
: Not applicable.
: The authors declare that they have no competing interests.