Ye, Xiaoguang
Li, Zhitian
Li, Yidan
Cai, Qizhe
Sun, Lanlan
Zhu, Weiwei
Ding, Xueyan
Guo, Dichen
Qin, Yunyun
Lu, Xiuzhang
Article History
Received: 4 January 2021
Accepted: 25 May 2021
First Online: 29 May 2021
Declarations
:
: The study approved by the Beijing Chaoyang hospital ethics committee, which waived the need for informed consent in compliance with China law on retrospective studies of anonymized data and was conducted in compliance with the Declaration of Helsinki.
: Not applicable.
: None.