1. Sleep Assessment Unit, Department of Psychiatry, Faculty of MedicineChinese University of Hong Kong Shatin Hong Kong China
2. Sleep Medicine CenterWest China Hospital, Sichuan University Chengdu Sichuan China
3. Department of Psychology and State Key Laboratory of Brain and Cognitive SciencesUniversity of Hong Kong Pokfulam Hong Kong China
4. Department of Neurology and NeurosurgeryMcGill University Montreal Quebec Canada
5. Division of Neurology, Department of Medicine and Therapeutics, Faculty of MedicineChinese University of Hong Kong Shatin Hong Kong China