1. School of Computer Science and Engineering, South China University of Technology, Guangdong, China
2. King's College London, London, U.K.
3. Ministry of Education Key Laboratory of Big Data and Intelligent Robot and Guangdong, and State Key Laboratory of Subtropical Building Science, Provincial Key Lab of Computational Intelligence and Cyberspace Information
4. Caritas Institute of Higher Education, Hong Kong SAR, China
5. School of Computing and Information Systems, Singapore Management University, Singapore