Text and Data Mining valid from 2019-12-01
Received: 9 May 2019
Accepted: 6 December 2019
First Online: 16 December 2019
Ethics approval and consent to participate
: The present study was approved by the Ethic Committee of Zhejiang Cancer Hospital, and all participants gave written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.