1. Division of Neurosurgery, University of Nigeria Ituku/Ozalla Campus, Enugu, Nigeria
2. Department of Pediatrics, University of Nigeria Ituku/Ozalla Campus, Enugu, Nigeria
3. Department of Morbid and Anatomic Pathology, University of Nigeria Ituku/Ozalla Campus, Enugu, Nigeria
4. Department of Ophthalmology, University of Nigeria Ituku Ozalla Campus, Enugu, Nigeria
5. Department of Anaesthesia, University of Nigeria Ituku/Ozalla Campus, Enugu, Nigeria
6. Department of Clinical Neuroscience and Rehabilitation, Institute of Neuroscience and Physiology, University of Gothenburg, Gothenburg, Sweden
7. Department of Neurosurgery, Uppsala University Hospital, Uppsala, Sweden