Funding for this research was provided by:
The National Key Research and Development Project (SQ2018YFC200148)
National Natural Science Foundation of China (81570085)
Article History
Received: 13 July 2020
Revised: 8 February 2021
Accepted: 9 March 2021
First Online: 30 March 2021
Declarations
:
: This retrospective chart review study involving human participants was in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The Research Ethics Committee of Peking Union Medical College Hospital approved this study with a waiver of patient consent (protocol number S-K1190).
: The authors declare no competing interests.