Funding for this research was provided by:
National Nature Science Foundation of China (81902657, 81702559, 81101984)
China Postdoctoral Science Fund (21510077311145, 21300076311047)
Article History
Received: 18 December 2020
Accepted: 24 August 2021
First Online: 8 September 2021
Declarations
:
: The authors have no conflicts of interest to declare.
: This is an observational study. The Research Ethics Committee of Shandong University Qilu hospital has confirmed that no ethical approval is required.
: The research did not involve personal information about the patient participants, and the requirement for informed consent was exempted by the Review Board of Shandong University Qilu hospital.