Yang, Ying
Chen, Yaping
Tong, Bingdu
Tian, Xue
Yu, Chunjie
Su, Zhe
Zhang, Jianguo
Article History
Received: 13 June 2021
Accepted: 25 November 2021
First Online: 13 December 2021
Declarations
:
: Approval for the study was obtained from the ethics committee at Peking Union Medical College Hospital. Due to the retrospective nature of this research, exemption of informed consent was granted by the ethics committee at Peking Union Medical College Hospital. The authors confirmed that all methods were performed in accordance with the relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interest.