1 Department of Neurology, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.
2 Department of Neurology, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.
3 Department of Neurology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
4 Department of Neurology, Mayo Clinic, Rochester, MN, United States.