Funding for this research was provided by:
Capital’s Funds for Health Improvement and Research (NO. 2020-2-40111)
Excellence Program of Key Clinical Specialty of Beijing in 2020 for Critical Care Medicine, Beijing Municipal Science and Technology Commission (No. Z201100005520051)
Article History
Received: 10 December 2021
Accepted: 11 February 2022
First Online: 5 March 2022
Declarations
:
: The ethics review board of Peking Union Medical Collage Hospital approved the study protocol. Informed consent was not applicable for the retrospective study.
: Not applicable.
: The authors declare that they have no competing interests.