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Article History

Received: 6 September 2020

Accepted: 16 November 2020

First Online: 23 November 2020

Ethics approval and consent to participate

: The protocol for this investigation was approved by the Ethics Committee of the West China Second University Hospital, Sichuan University. The research assistants obtained the written informed consent from study participants at the beginning of this study.

: Not applicable.

: The authors declare that they have no competing interests.