Funding for this research was provided by:
The Scientific Research Fund of the First Hospital of Lanzhou University (ldyyyn2018-11)
the Lanzhou Talent Innovation and Entrepreneurship Project (2016-RC-51)
Article History
Received: 26 March 2020
Accepted: 8 November 2020
First Online: 25 November 2020
Compliance with Ethical Standards
:
: The authors declare that there are no conflicts of interest.
: This study was approved by the Ethics Committee of the First Hospital of Lanzhou University (LDYYLL2019-42).