1. Department of Respiratory and Critical Medicine, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
2. Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
3. First Hospital of Lanzhou University, Lanzhou 730009, China
4. Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing 100029, China
5. Beijing Anzhen Hospital Centre for Sleep Medicine and Science, Capital Medical University, Beijing 100029, China