1. Department of Otorhinolaryngology and Head & Neck Surgery; St. Mary's Hospital, Imperial College Healthcare NHS Trust; London United Kingdom
2. Department of Endocrine and Thyroid Surgery; Hammersmith Hospital, Imperial College Healthcare NHS Trust; London United Kingdom
3. Department of Endocrinology; St. Mary's Hospital, Imperial College Healthcare NHS Trust; London United Kingdom
4. Department of Surgery and Cancer; Imperial College London; St. Mary's Hospital Campus London United Kingdom