1. Sleep Center and Department of Pulmonary and Critical Care Medicine, Chang Gung Memorial Hospital, Chiayi, Taiwan
2. Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, and Chang Gung University of Science and Technology, Taoyuan, Taiwan
3. Center for Sleep and Circadian Neurobiology
4. Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA
5. Department of Pulmonary Medicine, Peking University First Hospital, Beijing, China