Funding for this research was provided by:
National Basic Research Program of China (973 Program) (No.2018YFC1313201)
Text and Data Mining valid from 2019-09-14
Received: 29 June 2019
Accepted: 9 September 2019
First Online: 14 September 2019
Ethics approval and consent to participate
: The study was approved by the institutional review board and ethics committee of the Shandong Cancer Hospital and Institute. All the patients enrolled in this study signed informed consents.
: Not application.
: The authors declare that they have no competing interests.