Runsen Chen1, Jing An2, Jianjun Ou3. 1. Department of Psychiatry and Mental Health Institute, Second Xiangya Hospital, Central South University, Chinese National Clinical Research Center on Mental Disorders (Xiangya), Changsha, Hunan 410011, China; Chinese National Technology Institute on Mental Disorders, Hunan Key Laboratory of Psychiatry and Mental Health, Changsha, Hunan, China; Department of Psychiatry, University of Oxford, Oxford, UK. 2. Beijing Huilongguan Hospital, WHO Collaborating Center for Research and Training in Suicide Prevention, Beijing, China. 3. Department of Psychiatry and Mental Health Institute, Second Xiangya Hospital, Central South University, Chinese National Clinical Research Center on Mental Disorders (Xiangya), Changsha, Hunan 410011, China; Chinese National Technology Institute on Mental Disorders, Hunan Key Laboratory of Psychiatry and Mental Health, Changsha, Hunan, China. Electronic address: oujianjun@csu.edu.cn.