1. Department of Neurology, The First Teaching Hospital of Jilin University, 71 Xinmin St., Changchun 130021, People's Republic of China.
2. Neuropsychiatry Research Unit, Department of Psychiatry, College of Medicine, University of Saskatchewan, 103 Wiggins Rd., Saskatoon, SK S7N 5E4, Canada.
3. Department of Physiology, College of Medicine, University of Saskatchewan, 107 Wiggins Rd., Saskatoon, SK S7N 5E5, Canada.
4. Department of Neurology, Shanghai Changhai Hospital, Second Military Medical University, 174 Changhai Rd., Shanghai 200433, People's Republic of China.
5. Department of Psychiatry, University of Manitoba, PZ432-771 Bannatyne Ave., Winnipeg, MB R3E 3N4, Canada.