1. School of Nursing, Peking University, Beijing, China
2. Department of Neurology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
3. Sleep Medicine Center, Department of Respiratory and Critical Care Medicine, Peking University People’s Hospital, Beijing, China
4. Department of Neuromedicine, Peking University People’s Hospital, Beijing, China
5. PKU-UPenn Sleep Center, Peking University International Hospital, Beijing, China