1. Center of Psychosomatic Medicine, Sichuan Provincial Center for Mental Health, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China
2. School of Automation, Northwestern Polytechnical University, Xi'an, China
3. School of Computing, University of Georgia, Athens, GA, USA
4. MOE Key Lab for Neuroinformation, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China