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Article History

Received: 7 September 2019

Accepted: 29 April 2020

First Online: 15 May 2020

Ethics approval and consent to participate

: This research was approved by the Human Ethics Committee of Shandong Mental Health Center. All patients were provided with written, informed consent. Participation was voluntary, and participants could withdraw at any time during the study.

: Not applicable.

: The authors declare that they have no competing interests.