Article History
Received: 15 July 2021
Accepted: 13 October 2021
First Online: 19 November 2021
Declarations
:
: The authors declare that they have no conflict of interest.
: The protocol of this research has been approved by the Ethics Committee of Yantai Affiliated Hospital of Binzhou Medical University. The study was performed in accordance with the ethical standards as laid down in the 1964 Declaration of Helsinki and its later amendments.
: All patients have signed written informed consent.