Funding for this research was provided by:
Heilongjiang Provincial Health Committee in 2019 (No. 2019-253)
Article History
Received: 21 January 2021
Accepted: 9 June 2021
First Online: 22 June 2021
Declarations
:
: The authors declare that they have no financial conflicts of interest.
: Written informed consent was obtained from patients with approval by the Institutional Review Board in Yantai City Municipal Government Hospital.