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Article History

Received: 6 August 2021

Accepted: 15 February 2022

First Online: 24 February 2022

Declarations

:

: This study was performed in accordance with the Ethical Principles for Medical Research Involving Human Subjects (Declaration of Helsinki). Ethics approval and consent for the study was approved by the Ethics Committee of the Xi'an Jiaotong University Health Science Center (approval date: 30/6/2014). Prior to the telephone interview, verbal consent was obtained from all subjects involved in the study. All patient information was anonymised and de-identified prior to analysis.

: Not applicable.

: The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.