Funding for this research was provided by:
QingHai Department of Science and Technology (2019-SF-131)
the Guangxi Zhuang Autonomous Region Science and Technology Department Project (No.2020JJA140073)
Received: 31 August 2020
Accepted: 28 February 2021
First Online: 7 March 2021
: This study was approved by the ethics review board of the Affiliated Hospital of Qinghai University (approval number: P-SL-2019054). Written informed consent was obtained from all patients.
: Not applicable.
: The authors declare that they have no competing interests.