1. School of Computer Science and Engineering, Northeastern University, Shenyang, China
2. College of Medicine and Biological Information Engineering, Northeastern University, Shenyang, China
3. School of Information Technology, Deakin University, Victoria, Australia
4. Department of Informatics, Modeling, Electronics and Systems, University of Calabria, Rende, Italy
5. Department of Game Design, Faculty of Arts, Uppsala University, Uppsala, Sweden