1. Department of Biomedical Engineering, Peking University, Beijing, 100871, China
2. Department of Pulmonary Medicine, Peking University First Hospital, Beijing, 100871, China
3. Sleep Disorders Center, Mei Tan General Hospital, Beijing, 100028, China
4. DynaDx Corporation, Mountain View, CA 94041, USA
5. Biomed-X Research Center, Academy of Advanced Interdisciplinary, Peking University, Beijing, 100871, China
6. Margret & H.A. Rey Institute of Nonlinear Dynamics in Physiology and Medicine, Division of Interdisciplinary Medicine and Biotechnology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA