1. Section of Neurosurgery, Department of Surgery, Jose R. Reyes Memorial Medical Center, Manila, Philippines;
2. Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan;
3. Division of Neurosurgery, Department of Surgery, Udayana University Hospital, Faculty of Medicine, Udayana University, Bali, Indonesia;
4. Philippine Board of Neurological Surgery and Philippine Gamma Knife Center, Cardinal Santos Medical Center, Manila, Philippines;
5. Section of Neurosurgery, Department of Neurosciences, University of the Philippines–Philippine General Hospital, University of the Philippines College of Medicine, Manila, Philippines;
6. Department of Neurosurgery, Hospital Kuala Lumpur, Malaysia;
7. Department of Neurosurgery, West Nusa Tenggara Province Hospital, Faculty of Medicine, Mataram University, Mataram, Indonesia;
8. Division of Neurosurgery, Department of Surgery, Sanglah General Hospital, Faculty of Medicine, Udayana University, Bali, Indonesia; and
9. Division of Neurosurgery, Department of Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan