Funding for this research was provided by:
National Natural Science Foundation of China (81602323, 81872149)
Natural Science Foundation of Heilongjiang Province (H201406)
Wu Lien-teh Science Foundation of Harbin Medical University (WLD-QN1706)
Distinguished Young Scholars of Harbin Medical University Cancer Hospital (JCQN2018-03)
Yong Elite Training Foundation Grant of Harbin Medical University Cancer Hospital (JY2016-02)
Text and Data Mining valid from 2019-02-14
Received: 22 October 2018
Accepted: 8 February 2019
First Online: 14 February 2019
Ethics approval and consent to participate
: This study protocol conformed to clinical research guidelines and was approved by the research ethics committee of Harbin Medical University Cancer Hospital.
: Not applicable.
: The authors declare that they have no competing interest.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.