1. College of Electronic and Information Engineering, Southwest University, Chongqing, China
2. Pediatric Respirology Department, The Ninth People's Hospital of Chongqing, Chongqing, China
3. Department of Biomedical Engineering, City University of Hong Kong, Kowloon Tong, Hong Kong
4. Department of Computer Science and Media Technology, Linnaeus University, Växjö, Sweden
5. Department of Computer Science, University of Otago, Dunedin, New Zealand