1. Division of Neurosurgery, Department of Surgery, Federal Medical Center, Owo, Ondo State, Nigeria
2. Department of Neurological Surgery, University College Hospital, Ibadan, Oyo State, Nigeria
3. Division of Neurological Surgery, Department of Surgery, College of Medicine, University of Ibadan, Ibadan, Oyo State, Nigeria
4. Department of Accident and Emergency, Federal Medical Center, Owo, Ondo State, Nigeria