Received: 16 June 2020
Accepted: 26 December 2020
First Online: 12 January 2021
Ethics approval and consent to participate
: Written informed consent is obtained from all patients before enrollment, patients consented with the anonymous use of their data for study purposes. The study has been approved by the Institutional Review Board at the Cancer Hospital of the University of Chinese Academy of Sciences (accepted number: 2019–139), and was undertaken in accordance with the Helsinki declaration and the Chinese Good Clinical Practice Guidelines. Ethics approval will be sought from each participating center prior to the study beginning at the site.
: Not applicable.
: The authors declare that they have no competing interests.