1. Department of Psychology, Hunan Agricultural University, Changsha, PR China
2. Centre for Affective Disorders, Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, UK
3. Department of Psychiatry, Brains Hospital of Hunan Province, Changsha, PR China
4. Xiangya School of Public Health, Central South University, Changsha, PR China