1. Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, China;
2. Psychiatric Laboratory and Mental Health Center, West China Hospital, Sichuan University, Chengdu, China;
3. Department of Neurosurgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
4. Department of Surgery, Division of Neurosurgery, University of Toronto, Ontario, Canada; and