1. Department of Endocrinology, Leeds Centre for Diabetes and Endocrinology, St James's University Hospital Leeds Teaching Hospitals NHS Trust Leeds UK
2. Division of Cardiovascular and Diabetes Research, Leeds Institute of Cardiovascular and Metabolic Medicine (LICAMM) University of Leeds Leeds UK
3. Department of ENT Surgery Doncaster Royal Infirmary Doncaster UK
4. Department of Clinical Oncology, Leeds Cancer Centre, St James's University Hospital Leeds Teaching Hospitals NHS Trust Leeds UK
5. Department of ENT Surgery, Leeds General Infirmary Leeds Teaching Hospitals NHS Trust Leeds UK