Affiliation: | aDepartment of Neurobiology, Institute of Geriatrics of Xuanwu Hospital, Capital Medical University, No 45, Chang Chun Street, Beijing 100053, China;bDepartment of Neurology, Beijing Ji Shuitan Hospital, the 4th Medical College of Peking University, Beijing, China;cDepartment of Epidemiology and Social Medicine, Xuan Wu Hospital, Capital Medical University, Beijing, China |