1. Department of Pulmonary Medicine, Peking University People’s Hospital, Beijing, China
2. Sleep and Psychosomatic Medicine Center, The Third People’s Hospital of Hainan Province, Sanya, Hainan, China
3. Department of Anesthesia, Peking University People’s Hospital, Beijing, China
4. Laboratory of Chemical Pharmacology, Daiichi University of Pharmacy, Minami-ku, Fukuoka, Japan
5. Department of Pharmacology, School of Basic Medical Sciences, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, and Institutes of Brain Science, Fudan University, Shanghai, China
6. Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Case Western Reserve University, and Cleveland Louis Stokes VA Medical Center, Cleveland, OH
7. Isotope Science Center, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
8. Department of Neurology, Peking University People’s Hospital, Beijing, China