Institute of Mental Health;
Xiangya School of Medicine;
Central South University;
School of Computer and Communication;
Changsha University of Science and Technology;
Changsha 410076;
China;
School of Computer and Communication;
Changsha University of Science and Technology;
Department of Computer Engineering;
Hunan College of Information;
Changsha 410200;
China;
School of Computer Science;
University of Birmingham;