1. 1Department of Otolaryngology, Frimley Park Hospital, Portsmouth Road, Frimley, Surrey, GU16 7UJ, UK
2. 2Department of Surgery, Central General Hospital, University of Cape Coast, Cape Coast, Ghana
3. 3Department of Otolaryngology, Poole General Hospital, Longfleet Road, Poole, Dorset, BH15 2JB, UK