1 Department of Neurobiology, Neurology and Geriatrics, Xuanwu Hospital of Capital Medical University, Beijing Institute of Geriatrics, Beijing, China.
2 National Clinical Research Center for Geriatric Disorders, Xuanwu Hospital, Beijing, China.
3 Jockey Club Institute of Ageing, The Chinese University of Hong Kong, Hong Kong, SAR, China.
4 Department of Medicine and Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, SAR, China.