Funding for this research was provided by:
Key Technologies Research and Development Program (2020YFC0861000)
National Natural Science Foundation of China (81801901)
Received: 24 November 2020
Accepted: 5 March 2021
First Online: 19 March 2021
: The study was conducted in accordance with the <i>Declaration of Helsinki</i> (as revised in 2013). The trial protocol was approved by the Central Institutional Review Board at Peking Union Medical College Hospital (NO.: S-K1297) and individual consent for this retrospective analysis was waived. The authors are accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.
: All authors have seen and agreed with the contents of the manuscript, and the manuscript has been submitted solely to this journal and is not published, in press, or submitted elsewhere.
: The authors declare that they have no competing interests.