Funding for this research was provided by:
Peking University International Hospital Research (YN2019QN11)
Beijing science and technology commission "Applied research on clinical characteristics of the capital city" (Z171100001017095)
Received: 14 December 2020
Accepted: 23 February 2021
First Online: 7 October 2021
: Not applicable.
: The authors declare that they have no conflict of interests.