Dong, Jie
Sun, Qingqing
Pan, Yueyin
Lu, Nannan
Han, Xinghua
Zhou, Qiong
Article History
Received: 18 January 2021
Accepted: 7 June 2021
First Online: 14 June 2021
Declarations
:
: The ethics committee of The First Affiliated Hospital of USTC approved the study. And informed consent was exempted by the ethics committee of The First Affiliated Hospital of USTC due to the retrospective nature of the study. All methods were conducted in accordance with relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.