1. College of Systems Engineering, National University of Defense Technology, Changsha 410073, China
2. WorldPop, School of Geography and Environmental Science, University of Southampton, Southampton SO17 1BJ, UK
3. School of Mathematics and Big Data, Foshan University, Foshan 510000, China
4. State Key Laboratory on Blind Signal Processing, Chengdu 610041, China
5. State Key Laboratory of Management and Control for Complex Systems, Institute of Automation, Chinese Academy of Sciences, Beijing 100190, China
6. Chinese Evidence-Based Medicine Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu 610041, China
7. Big Data Research Center, University of Electronic Science and Technology of China, Chengdu 611713, China
8. West China Biomedical Big Data Center, West China Hospital, Sichuan University, Chengdu 610047, China
9. Tokyo Tech World Hub Research Initiative, Institute of Innovative Research, Tokyo Institute of Technology, Tokyo 226-8503, Japan
10. School of Business, Central South University, Changsha 410083, China
11. Institute of Big Data and Internet Innovations, Hunan University of Technology and Business, Changsha 410205, China