1. Department of Geriatric Medicine and Neurology West China School of Public Health and West China Fourth Hospital Sichuan University Chengdu People’s Republic of China
2. Department of Neurology West China Hospital Sichuan University Chengdu People’s Republic of China
3. Xindu Hospital of Traditional Chinese Medicine Chengdu Medical College Chengdu Sichuan People’s Republic of China
4. Medical College of Tibet University Lhasa People’s Republic of China