Chen, Yaolin
Liu, Xiangzhen
Liu, Jijun
Liang, Donghua
Zhao, Mingdong
Yu, Weiguang
Chen, Pengfei
Article History
Received: 30 August 2020
Accepted: 26 January 2021
First Online: 2 February 2021
Ethics approval and consent to participate
: The retrospective study was approved by the Institutional Review Boards (IRBs) of each participating hospital; and written informed consent was waived by the IRBs.
: Not applicable.
: The authors declare that they have no competing interests.