Institution: | (1) Department of Otorhinolaryngology, Head and Neck Surgery, Singleton Hospital, Swansea NHS Trust, Sketty, Swansea, SA2 8QA, UK;(2) Department of Radiology, Singleton Hospital, Swansea NHS Trust, Swansea, UK;(3) Department of Pathology, Singleton Hospital, Swansea NHS Trust, Swansea, UK |