Text and Data Mining valid from 2019-08-27
Received: 13 May 2019
Accepted: 19 August 2019
First Online: 27 August 2019
Ethics approval and consent to participate
: This study was approved by the Mental Health Institute of Central South University Xiang-Ya Second Hospital. All subjects signed an informed consent to participate in this study, which was carried out in accordance with the Helsinki Declaration.
: Not applicable.
: The authors declare that they have no competing interests.