1. Sleep Medicine Center, Department of Respiratory and Critical Care Medicine, Mental Health Center, Translational Neuroscience Center, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
2. Sleep Medicine Center, Shantou University Medical College, Shantou, China
3. National Institute on Drug Dependence, Peking University Sixth Hospital, Peking University, Beijing, China
4. Sleep Research Laboratory, Department of Pathology and Anatomy, Eastern Virginia Medical School, Norfolk, VA