Received: 1 July 2021
Accepted: 13 December 2021
First Online: 16 December 2021
: The study was conducted in accordance with the declaration of Helsinki and was approved by the Bioethics Committee of Beijing Friendship Hospital, Capital Medical University (IRB no. 2018-P2-191-01). This was a retrospective cohort study and patient consent was not required for data collection or analysis, as approved by the aforementioned institutional review board. All methods were performed in accordance with the relevant guidelines and regulations.
: Not applicable.
: The authors declare no competing financial interests.