1. Department of Pulmonary Medicine, the Peking University People's Hospital, Beijing, China
2. Center for Sleep Sciences and Medicine, and Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Palo Alto, CA
3. Institute of Human Genetics, Technische Universität München, Munich, Germany and Institute of Human Genetics, Helmholtz Zentrum München—German Research Center for Environmental Health, Neuherberg, Germany
4. Department of Biomedical and Neuromotor Sciences, University of Bologna and IRCCS Institute of Neurological Sciences, Bologna, Italy
5. Department of Neurology, Charles University in Prague, 1st Faculty of Medicine, Czech Republic
6. Danish Center for Sleep Medicine, Department of Clinical Neurophysiology, Glostrup Hospital, University of Copenhagen, Denmark
7. Norwegian Resource Center for ADHD, TS and Narcolepsy (NK), Oslo University Hospital, Ullevål, Norway
8. Department of Pathology, Stanford University School of Medicine, Stanford, CA
9. Stanford Genome Technology Center, Stanford University, Palo Alto, CA