Funding for this research was provided by:
National Key Research and Development Program of China (2018YFC2001905)
Peking University People’s Hospital Research and Development Funds (RDY2019-43)
Received: 21 January 2020
Accepted: 11 May 2020
First Online: 16 May 2020
Ethics approval and consent to participate
: This was a retrospective cohort study approved by the Institutional Review Board (IRB) of Peking University People’s Hospital (IRB no.2019PHB038–01; approved on February 28, 2019). For this type of study, formal consent is not required.
: Not applicable.
: There is no conflict of interest of any authors in relation to the submission.