Article History
Received: 6 January 2022
Accepted: 27 May 2022
First Online: 11 June 2022
Declarations
:
: The author declares that they have no conflict of interest.
: Ethical approval for this study was granted by the research ethics committee of the Second Hospital of Hebei Medical University (approval number 2017R100). All methods were performed in accordance with the relevant guidelines and regulations. The health, rights and privacy of participants were fully protected. Potential risks to participants were minimal and controllable.
: All subjects were informed about the content of this study and signed an informed consent form.
: This paper has not been submitted to any another journal.