1. Sleep Assessment Unit, Department of Psychiatry, Faculty of Medicine The Chinese University of Hong Kong Shatin, Hong Kong China
2. Department of Psychology The University of Hong Kong Shatin, Hong Kong China
3. The State Key Laboratory of Brain and Cognitive Sciences The University of Hong Kong, Pokfulam Hong Kong China
4. Margaret K.L. Cheung Research Centre in Management of Parkinsonism, Gerald Choa Neuroscience Centre, Lui Che Woo Institute of Innovative Medicine, Division of Neurology, Department of Medicine and Therapeutics The Chinese University of Hong Kong Shatin, Hong Kong China
5. Guangdong Mental Health Center, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences Guangzhou Guangdong China