Funding for this research was provided by:
Chinese Academy of Medical Sciences (No. 2016-I2M-1-001)
Article History
Received: 12 May 2021
Accepted: 9 February 2022
First Online: 21 February 2022
Declarations
:
: Approval was waived by the Medical Ethics Committee of Peking Union Medical College Hospital, as the data retrieved from public databases is publicly available and de-identified.
: Not applicable.
: No potential conflict of interest was reported by the authors.