Funding for this research was provided by:
National Natural Science Foundation of China (81671966)
Natural Science Foundation of Beijing Municipality (7182155)
Application Research and Achievement Extension of Clinical Characteristics in Chinese Capital Foundation (Z171100001017160)
The Cultivation Program for Military Medical Science and Technology Youth -Growth Project (16QNP139)
Clinical Research Support Foundation of Chinese PLA General Hospital (2015FC-ZHCG-1002)
Received: 18 October 2019
Accepted: 12 August 2020
First Online: 27 August 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of Chinese People’s Liberation Army General Hospital, and all methods were in accordance with the Committee’s guidelines. We also obtained ethical approval from the ethics committee of each participating hospital. Since this study did not involve patient treatment, informed consent was not required.
: Not applicable.
: The authors declare that they have no competing interests.