1. School of Computer Science and Engineering, South China University of Technology, Guangzhou, China
2. Guangzhou University of Chinese Medicine and Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangdong Geriatric Institute, Guangzhou, China
3. Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangdong Geriatric Institute, Guangzhou, China
4. First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China