Funding for this research was provided by:
National Natural Science Foundation of China (81400141, 81770189, 81621001, U1401221, 81470349)
Science and Technology Program of Guangdong Province (2016B030230003, 2014B020226004)
Science and Technology Program of Guangzhou (201707010213)
Text and Data Mining valid from 2019-08-12
Received: 4 January 2019
Accepted: 16 July 2019
First Online: 12 August 2019
Ethics approval and consent to participate
: The study protocol was approved by the local ethics committee review board ( EC- NO. 037), and written informed consent was obtained from the donors and recipients in accordance with the Declaration of Helsinki before the initiation of the study.
: Participants’ consent was not obtained, but the presented data are anonymised, and risk of identification is low.
: The authors declare that they have no competing interests.