1. Department of Paediatric Surgery, The Royal Hospital for Sick Children, Edinburgh, United Kingdom of Great Britain and Northern Ireland
2. Department of Anaesthetics, Western General Hospital, Edinburgh, United Kingdom of Great Britain and Northern Ireland
3. Department of Clinical Neurosciences, Western General Hospital, Edinburgh, United Kingdom of Great Britain and Northern Ireland
4. Department of Neurosurgery, Leeds General Infirmary, Leeds, United Kingdom of Great Britain and Northern Ireland