Ethics approval and consent to participate
All participants provided written informed consent. The authors declare that all procedures contributing to this work comply with the ethical standards of the relevant national and institutional committees on human research and with the Helsinki Declaration of 1975, as revised in 2008. All procedures involving human subjects/patients were approved by the ethics committee of the Second Xiangya Hospital of Central South University (ref: 2016S035), the ethics committee of Xiangya Hospital of Central South University (ref: 201606587), and the Institutional Review Board of Shanghai Mental Health Center (ref: 2016KY-25).