1. Department of ENT, Sheffield Children’s NHS Foundation Trust, Sheffield, United Kingdom of Great Britain and Northern Ireland
2. Department of Anaesthesia, Sheffield Children’s NHS Foundation Trust, Sheffield, United Kingdom of Great Britain and Northern Ireland
3. Department of Audiology, Sheffield Children’s NHS Foundation Trust, Sheffield, United Kingdom of Great Britain and Northern Ireland
4. Department of ENT, Bradford Teaching Hospital NHS Foundation Trust, Bradford, United Kingdom of Great Britain and Northern Ireland