Article History
Received: 28 December 2020
Accepted: 5 March 2021
First Online: 19 March 2021
Ethics approval and consent to participate
: This study was approved by the Ethical Committee of Peking University People’s Hospital (No. 2020PHB402-01). We confirm that all the experiment protocol for involving human data was in accordance to guidelines of national/international/institutional and Declaration of Helsinki in the manuscript. The need for informed consent for this study was waived by the Ethical Committee of Peking University People’s Hospital (No. 2020PHB402-01) due to its retrospective nature.
: All authors have accepted responsibility for the entire content of this manuscript and approved its submission.
: The authors declare that they have no competing interests.