Funding for this research was provided by:
Chinese Academy of Medical Sciences (2016-I2M-3-024)
Article History
Received: 28 July 2020
Accepted: 5 January 2021
First Online: 12 January 2021
Ethics approval and consent to participate
: This investigation was a single-center retrospective, case-control study approved by the Peking Union Medical College (PUMC) Hospital Institutional Review Board (S-K745, April 25th, 2019). All the data were collected from the adverse-event reporting system, the anesthetic recording system and Hospital Information System of PUMC Hospital. No written informed consent was obtained from participants.
: The authors declare consent for publication, and there are no individual identifying data.
: The authors declare no competing interests.