Funding for this research was provided by:
Open Project of Beijing Key Laboratory of Tolerance Induction and Organ Protection in Transplantation (2017YZNS01)
National Natural Science Foundation of China (81601392)
Beijing Municipal Science and Technology Commission (Z181100001718164)
Received: 21 February 2021
Accepted: 21 April 2021
First Online: 1 May 2021
: The study was approved by the Institutional Review Board of Beijing Chaoyang Hospital (No. 2016-2-19-38) in accordance with the Helsinki declaration of 1975, as revised in 1983. Written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.