1. College of Electronic and Information Engineering, Southwest University, Chongqing, China
2. School of Computing, University of Otago, Dunedin, New Zealand
3. Internet of Things Smart City Innovation Platform, Zhuhai Fudan Innovation Institute, Zhuhai, China
4. Department of Biomedical Engineering, City University of Hong Kong, Kowloon Tong, Hong Kong
5. Interdisciplinary Sleep Medicine Center, Charité—Universitätsmedizin, Berlin, Germany