Received: 11 August 2020
Accepted: 26 October 2020
First Online: 13 November 2020
Ethics approval and consent to participate
: The study protocol was approved by the Research Ethics Committee of Sun Yat-Sen University Cancer Center, number B2020-005-62.
: We obtained the patients’ or legal representative’s consent for publication of this study.
: The authors declare that they have no competing interests.