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Article History

Received: 7 January 2022

Accepted: 31 July 2022

First Online: 17 August 2022

Declarations

:

: This study protocol was performed in accordance with the ethical standards as laid down in the 1964 Declaration of Helsinki and was approved by the Ethics Committee of Guangxi Medical University. Most participants sign informed consent, due to some participants' illiteracy, physical disability or other limiting condition, verbal consent is also an alternative.

: Not applicable.

: The authors declare that they have no competing interests.