Funding for this research was provided by:
Beijing Municipal Administration of Hospitals Clinical Medicine Development of Special Funding Support (ZYLX201701)
Supported by the Beijing Municipal Training for the Talents (2016000021469G190)
Received: 19 November 2018
Accepted: 8 August 2019
First Online: 23 August 2019
Ethics approval and consent to participate
: This study was conducted in accordance with the Declaration of Helsinki and had been authorized by the Ethics Committee of Peking University Cancer Hospital (Reference No. 2017KT37) before beginning the study. Each patient in this study provided signed informed consent.
: Not applicable.
: The authors declare that they have no competing interests.