Han, Fei
Zhang, Ding-Ding
Zhai, Fei-Fei
Xue, Jun
Zhang, Jiang-Tao
Yan, Shuang
Zhou, Li-Xin
Ni, Jun
Yao, Ming
Yang, Meng
Li, Ming-Li
Jin, Zheng-Yu
Dai, Qing
Zhang, Shu-Yang
Cui, Li-Ying
Zhu, Yi-Cheng
Article History
Received: 31 July 2020
Accepted: 19 November 2020
First Online: 8 January 2021
Ethics
: <b>Compliance and ethics</b> The author(s) declare that they have no conflict of interest. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standard. This study was approved by the institutional review board at Peking Union Medical College Hospital in Beijing, China. Informed consent was obtained from all individual participants included in the study.