Funding for this research was provided by:
National Natural Science Foundation of China (81572159, 81371945, 81871771)
Beijing Natural Sciences Grants (7132123, 7191010)
Received: 10 December 2019
Accepted: 5 March 2020
First Online: 27 March 2020
Ethics approval and consent to participate
: This study was approved by the institutional ethical review board of our Hospital (Rapid review of scientific research projects for use of discarded biological material).
: All donors’ data (including demographic, clinical, and imaging details) was consented for publication. The informed consent was obtained from all donors.
: The authors declare that they have no competing interests.