1. School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, People’s Republic of China
2. Division of Interdisciplinary Medicine and Biotechnology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215, USA
3. Key Laboratory of Biomedical Functional Materials, China Pharmaceutical University, Nanjing, Jiangsu 211198, China
4. Aerospace Sleep Medicine Center, Airforce General Hospital of PLA, Beijing 100142, China
5. School of Science, Beijing Jiaotong University, Beijing 100044, People’s Republic of China