1. Neuroscience Centres, University of Warwick and Walsgrave Hospital (DES), Coventry, England;
2. The Midland Centre for Neurosurgery & Neurology, Birmingham, England
3. Queen Elizabeth Hospital
4. Department of Neurosurgery, Aglaia Kyriakou Children's Hospital
5. Department of Neurosurgery, Evangelismos General Hospital, Athens, Greece