Funding for this research was provided by:
Clinical Research Support Fund of Chinese PLA General Hospital (2018FC-WJFWZX-2-16)
Chinese Academy of Medical Sciences (2019-I2M-5-061)
Received: 25 March 2020
Accepted: 8 July 2020
First Online: 13 July 2020
Ethics approval and consent to participate
: This study was reviewed and approved by the ethics committees of the Chinese PLA General Hospital.
: Not applicable.
: The authors declare that they have no competing interests.