1. Department of Neurosurgery, Hamad Medical Corporation, Doha, Qatar
2. Department of Neurosurgery, Saarland University Hospital, Homburg, Germany
3. Department of Neurosurgery, Hirslanden Klinik, Zurich, Switzerland
4. Neurosurgery, Johannes Gutenberg University of Mainz, Mainz, Germany
5. Department of Neurosurgery, Jordan University Hospital, Amman, Jordan
6. Department of Pediatric Neurosurgery, Bristol Royal Hospital for Children, Bristol, UK
7. College of Medicine, University of Baghdad, Baghdad, Iraq