1. School of Computer Science and Technology, Harbin Institute of Technology, Shenzhen, China
2. Department of Artificial intelligence Thrust, The Hong Kong University of Science and Technology, Hong Kong, China
3. School of Information Science and Technology, Dalian Maritime University, Dalian, China
4. National Clinical Research Center for Geriatrics, West China Hospital, and the Med-X Center for Manufacturing, Sichuan University, Chengdu, China