1. Department of Neurosurgery; Brigham and Women's Hospital; Harvard Medical School; Boston MA USA
2. Department of Neurology; The Second People's Hospital of Chengdu; Chengdu Sichuan China
3. Department of Neurology; The First Affiliated Hospital of Chongqing Medical University; Chongqing China
4. Department of Neurosurgery; Qilu Hospital, Shandong University; Jinan Shandong China
5. Department of Neurology; Xinqiao Hospital; Third Military Medical University; Chongqing China