Funding for this research was provided by:
the Capital Health Research and Development of Special Funds (2020-1-1021)
Beijing Municipal Administration of Hospital’s Ascent Plan (DFL20181104)
Beijing Municipal Administration of Hospitals’ Youth Programme (QML20181104)
B. Braun Anaesthesia Science Research Foundation (BBFD-2015-16)
Received: 25 December 2020
Accepted: 18 May 2021
First Online: 24 May 2021
: The study was in line with the Helsinki Declaration and approved by the Peking University Cancer Hospital Ethics Committee. Written informed consent was obtained from the patients for their anonymized information to be published in this study.
: Not applicable.
: The authors declare that they have no competing interests.