Ji, Yun
Li, Libin
Article History
Received: 2 December 2020
Accepted: 27 April 2021
First Online: 1 May 2021
Declarations
:
: 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.