Text and Data Mining valid from 2020-01-03
Received: 25 September 2019
Accepted: 27 December 2019
First Online: 3 January 2020
Ethics approval and consent to participate
: All patient samples and clinical data using were approved by the Ethics committee of the Peking University Cancer Hospital and the exemption from informed consent was approved as well.
: Not applicable.
: The authors declare that they have no competing interest.