1. Department of Neurosurgery, Penang General Hospital, Pulau Pinang, Malaysia
2. Department of Neurosurgery, Hospital Sungai Buloh, Selangor, Malaysia
3. Department of Neurosurgery, Sarawak General Hospital, Ministry of Health, Kuching, Malaysia
4. Department of Neurosciences, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
5. Department of Anaesthesiology and Intensive Care, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
6. National Head/Coordinator for Neurosurgical Services, Ministry of Health, Malaysia Care of Department of Neurosurgery, Hospital Sungai Buloh, Selangor, Malaysia