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Article History

Received: 16 December 2021

Accepted: 11 April 2022

First Online: 28 April 2022

Declarations

:

: As the retrospective nature of our study, we contacted patients by telephone to obtain informed consent from them and made telephone recordings. The Ethical Committee of first Hospital of Shanxi Medical University reviewed the telephone recordings and approved our study (Ethics No. K125). All methods were performed in accordance with the relevant guidelines and regulations. All participants gave informed consent.

: Not applicable.

: The authors declare that they have no competing interests.