Funding for this research was provided by:
Hunan Provincial Science and Technology Department (2017SK50312)
National Natural Science Foundation of China (81171287)
Text and Data Mining valid from 2019-06-17
Received: 12 December 2018
Accepted: 1 June 2019
First Online: 17 June 2019
Ethics approval and consent to participate
: The study was approved by the ethics committee of the Second Xiangya Hospital, Central South University (No. S065,2014). Written informed consent to participate in the study was obtained from each patient. Informed consent is obtained from a legal guardian under circumstances that the patient has severe suicidal thoughts/behaviors, or cannot understand or make appropriate judgments to the informed consent information.
: Not applicable.
: The authors declare that they have no competing interests.