1. Paediatric Immunology and Infectious Diseases, Great North Children's Hospital, Royal Victoria Infirmary, Newcastle upon Tyne, United Kingdom
2. Department of Neurosurgery, Great North Children’s Hospital, Royal Victoria Infirmary, Newcastle upon Tyne, United Kingdom
3. Department of Paediatrics, University Hospital of North Durham, Durham, United Kingdom
4. Department of Microbiology, Royal Victoria Infirmary, Newcastle upon Tyne, United Kingdom.