1. Department of Neurology; Guangdong General Hospital; Guangdong Academy of Medical Sciences; Guangdong Institute of Geriatrics; Guangdong Institute of Neurosciences; Guangzhou China
2. Department of Neurology; Baoan District Central Hospital; Shenzhen, Guangdong Province China
3. Guangdong Institute of Geriatrics; Department of Geriatric Medicine; Guangdong General Hospital; Guangdong Academy of Medical Sciences; Guangzhou China