Mao, Jia-yu
Li, Dong-kai
Zhang, Hong-min
Wang, Xiao-ting
Liu, Da-wei
Article History
Received: 1 November 2020
Accepted: 12 February 2021
First Online: 25 February 2021
Ethics approval and consent to participate
: This study was approved by the ethics committee of Peking Union Medical College Hospital, Beijing, China (Approval No. JS-1985). Written informed consent was obtained from the next of kin of each patient.
: Not applicable.
: The authors declare that they have no conflict of interest.