1. School of Medicine, Cardiff University, Cardiff, UK
2. College of Medicine, University of Ibadan, Ibadan, Nigeria
3. School of Medicine, Case Western Reserve University, Cleveland OH, USA
4. School of Medicine, University of Texas Southwestern Medical Center, TX, USA
5. School of Medicine, Vanderbilt University, Tennessee, USA
6. Department of Health, North West Province, Mahikeng, South Africa
7. Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Berea, South Africa
8. Faculty of Medicine, Ain Shams University, Cairo, Egypt
9. Michael Chilufya Sata School of Medicine, Copperbelt University, Kitwe, Zambia
10. College of Health Sciences, School of Medicine, University of Nairobi, Nairobi, Kenya
11. Glan Clwyd Hospital, Betsi Cadwaladr University Health Board, Wales, UK
12. School of Medicine, Philadelphia College of Osteopathic Medicine, Philadelphia, PA, USA
13. Department of Neurosurgery, Garki Hospital, Abuja, Nigeria
14. Department of Neurosurgery, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK
15. Department of Neuroscience, University of Sheffield, Sheffield, UK