1. Department of Neurosurgery, Tongji Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
2. Department of Neurosurgery, The First Affiliated Hospital, School of Medicine, Shihezi University, Shihezi, China
3. Department of Neurosurgery, University of Duisburg-Essen, Essen, Germany
4. Department of Neurosurgery, University Marburg, Marburg, Germany