1. Division of Neurosurgery, Department of Surgery, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand
2. School of Medicine, Mae Fah Luang University, Chiang Rai, Thailand
3. Division of Hematology/Oncology, Department of Pediatrics, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand
4. Division of Pediatric Neurology, Department of Pediatrics, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand
5. Division of Neurosurgery, Department of Surgery, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
6. Division of Neurosurgery, Department of Surgery, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand