1. Division of Neurosurgery, Department of Surgery, The Chinese University of Hong Kong, Shatin, Hong Kong
2. Departments of Neurosurgery, First and Second Affiliated Hospitals, Sun Yat Sen University, Guangzhou, China
3. Division of Neurosurgery, Department of Surgery, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong
4. Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Shatin, Hong Kong
5. Department of Anatomy, Capital Medical University, Beijing, China
6. Department of Neurosurgery, First Affiliated Hospital, Sun Yat Sen University, Guangzhou, China
7. Li Ka Shing Institute of Health Sciences, Department of Anatomical and Cellular Pathology, The Chinese University of Hong Kong, Shatin, Hong Kong