Funding for this research was provided by:
National Natural Science Foundation of China (81772372)
Shanghai Municipal Population and Family Planning Commission (201540102)
Received: 12 November 2019
Accepted: 25 February 2020
First Online: 4 March 2020
Ethics approval and consent to participate
: This study was approved by the ethics committee of Ruijin Hospital, Shanghai JiaoTong University.School of Medicine. Written consent to donate their body was obtained from the individuals and their body was indeed donated only for research or scientific purposes.
: Written consent to publish the related images or clinical details of specimens was provided by donors included in the study.
: The authors have no conflict of interest.