1. Department of Neurology, Rui�Jin Hospital, Shanghai Jiao Tong University, Shanghai 200025, P.R.�China
2. Department of Neurology, Xin Hua Hospital, Shanghai Jiao Tong University, Shanghai 200082, P.R. China
3. Department of Pancreatic Surgery, Rui�Jin College of Clinical Medicine, Rui�Jin Hospital, Shanghai Jiao Tong University, Shanghai 200025, P.R.�China
4. Department of Neurology, Rui Jin Hospital, Shanghai Jiao Tong University, Shanghai 200025, P.R. China