1 Imaging Department, Hammersmith Hospital, Imperial College Healthcare NHS Trust, Du Cane Rd., London W12 0HS, United Kingdom.
2 Department of Endocrinology and Diabetes, Hammersmith Hospital, Imperial College Healthcare NHS Trust, Du Cane Rd., London W12 0HS, United Kingdom.
3 Department of Thyroid and Endocrine Surgery, Hammersmith Hospital, Imperial College Healthcare NHS Trust, Du Cane Rd., London W12 0HS, United Kingdom.
4 Imaging Department, Hammersmith Hospital, Imperial College Healthcare NHS Trust, Du Cane Rd., London W12 0HS, United Kingdom. Electronic address: a.alsafi@imperial.ac.uk.