1. From the Sleep Medicine Center, Department of Respiratory and Critical Care Medicine, Translational Neuroscience Center, State Key Laboratory, West China Hospital, Sichuan University, Chengdu, China (R.R., Y.Z., F.L., L.Y., J.Z., L.T., T.L., X.T.)
2. Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN (N.C., V.K.S.)
3. Sleep Medicine Center, Shantou University Medical College, Shantou, China (Y.L.)
4. National Institute on Drug Dependence, Peking University Sixth Hospital, Institute of Mental Health and Key Laboratory of Mental Health, Peking University, Beijing, China (L.L., J.S.).