1. Department of Neurology, The Fourth Hospital of Harbin Medical University, Harbin, China
2. Department of Ultrasonography, The Fourth Hospital of Harbin Medical University, Harbin, China
3. Department of Endocrinology, The First Hospital of Jilin University, Changchun, China
4. Department of Neurology, The Second Hospital of Heilongjiang Province, Harbin, China
5. Department of Neurology, The Second Hospital of Harbin Medical University, Harbin, China
6. Department of Neurology, Gongli Hospital of The Second Military Medical University, Shanghai, China
7. Department of Neuroscience, Mayo Clinic, Jacksonville, FL 32224, USA