1. Department of Radiology, Division of Diagnostic Radiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
2. Department of Surgery, Division of Neurosurgery, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand
3. Department of Radiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
4. Philips Healthcare, Toa Payoh, Singapore
5. Department of Medical Imaging, Division of Neuroradiology, Faculty of Medicine, University of Toronto, Canada