Feng, H. E.
Weihong, Y. U.
Dong, Fangtian
Article History
Received: 14 January 2021
Accepted: 20 April 2021
First Online: 7 June 2021
Declarations
:
: The study was approved by the Ethics Committee of Peking Union Medical College Hospital. All procedures were carried in accordance with the tenets of the Declaration of Helsinki. Informed consent was obtained from all participants.
: Not applicable.
: The authors have no conflicts of interest to declare.