1. School of Computer Sciences, Guangdong Polytechnic Normal University, Guangzhou, China
2. School of Software, Northwestern Polytechnical University, Xi’an, China
3. Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow, U.K.
4. School of Computer Science and Engineering, Northwestern Polytechnical University, Xi’an, China
5. School of Biomedical Engineering, Western University, London, ON, Canada
6. School of Computer Science and Technology, Tianjin University, Tianjin, China
7. School of Medicine and Dentistry, University of Aberdeen, Aberdeen, U.K.