Funding for this research was provided by:
Innovative Research Group Project of the National Natural Science Foundation of China (81801886)
Received: 17 February 2020
Accepted: 26 June 2020
First Online: 14 July 2020
Ethics approval and consent to participate
: The establishment of this database was approved by the Massachusetts Institute of Technology (Cambridge, MA) and Beth Israel Deaconess Medical Center (Boston, MA), and consent was obtained for the original data collection. Therefore, the ethical approval statement and the need for informed consent were waived for this manuscript.
: Not applicable
: The authors declare that they have no competing interests.