Funding for this research was provided by:
Chinese National Major Project for New Drug Innovation (2017ZX09304015, 2019ZX09201002)
National Natural Science Foundation of China (81871739, 81472752)
CAMS Innovation Fund for Medical Sciences (2016-I2M-1-001)
Received: 7 July 2019
Accepted: 25 September 2019
First Online: 10 October 2019
Ethics approval and consent to participate
: This is a retrospective study in nature. The study was approved by the Independent Review Board (IRB) of Cancer Hospital, Chinese Academy of Medical Sciences and BGI Genomics (CH-BMS-018, BGI-IRB18035).
: Not applicable.
: The authors declare that they have no competing interests.