1. Department of Computer ScienceCollege of Engineering, Shantou UniversityShantouPeople's Republic of China
2. Guangdong Provincial Key Lab of Computational Intelligence and Cyberspace InformationSchool of Computer Science and Technology, South China University of TechnologyGuangzhouPeople's Republic of China
3. Center for Smart Health, School of Nursing, The Hong Kong Polytechnic UniversityHong Kong