1. Pazhou Lab, Guangzhou, People's Republic of China
2. School of Software, South China Normal University, Guangzhou, People's Republic of China
3. School of Automation Science and Engineering, South China University of Technology, Guangzhou, People's Republic of China
4. International Unresponsive Wakefulness Syndrome and Consciousness Science Institute, Hangzhou Normal University, Hangzhou, People's Republic of China