1 Department of Neurology The First Affiliated Hospital of Anhui University of Traditional Chinese Medicine Hefei China.
2 Department of Neurobiology, Neurology and Geriatrics Xuanwu Hospital of Capital Medical University, Beijing Institute of Geriatrics Beijing China.
3 Clinical Center for Parkinson's Disease; Key Laboratory for Neurodegenerative Disease of the Ministry of Education, Beijing Key Laboratory for Parkinson's Disease Parkinson Disease Center of Beijing Institute for Brain Disorders Beijing China.
4 Department of Nuclear Medicine Xuanwu Hospital of Capital Medical University Beijing China.
5 Department of Radiology Xuanwu Hospital of Capital Medical University Beijing China.
6 National Clinical Research Center for Geriatric Disorders Beijing China.