Hou, Guozhu
Zhao, Dachun
Jiang, Yuanyuan
Zhu, Zhaohui
Huo, Li
Li, Fang
Cheng, Wuying
Article History
Received: 28 November 2020
Accepted: 15 February 2021
First Online: 25 February 2021
Ethics approval and consent to participate
: This retrospective study of existing patient data and images was approved by the institutional review board of Peking Union Medical College Hospital. The requirement for informed consent was waived.
: All authors consent to the publication of this manuscript.
: The authors declare that they have no competing interests.