Funding for this research was provided by:
Beijing Municipal Administration of Hospitals (DFL20150601)
National Natural Science Foundation of China (81670391)
National Key Research and Development Program of China (2017YFC0908800)
Beijing Municipal Administration of Hospitals’ Mission Plan (SML20180601)
Beijing Municipal Health Commission - “Project of Science and Technology Innovation Center” (PXM2019_026272_000006 and PXM2019_026272_000005)
Received: 13 October 2020
Accepted: 9 November 2020
First Online: 16 November 2020
Ethics approval and consent to participate
: This study was approved by the institutional review board of Beijing Anzhen Hospital, Capital Medical University. Given the retrospective nature of this study, the requirement for informed consent was waived.
: Not applicable.
: The authors declare that they have no competing interests.