1. Division of Neurosurgery, Department of Surgery, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand
2. Department of Surgery and Department of Biomedical Sciences, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand
3. Department of Pharmacy Administration, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Songkla Thailand
4. Department of Pathology, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand