Funding for this research was provided by:
Shandong key research and development programs (2018GSF118048, 2018GSF118006)
National key research and development programs of China (2017YFC0113202)
National Natural Science Foundation of China (81472811)
Received: 17 June 2019
Accepted: 19 December 2019
First Online: 27 December 2019
Ethics approval and consent to participate
: This study was approved by the Research Ethics Board of the Shandong Cancer Hospital, and informed consent was obtained from all the patients.
: Not applicable.
: The authors declare that they have no competing interests.