Affiliation: | (1) Department of Otolaryngology, Head and Neck Surgery, Royal Infirmary of Glasgow, Glasgow, Scotland, UK;(2) Department of Otolaryngology, The Royal Infirmary, Edinburgh, Scotland, UK;(3) Department of Medicine, The Royal Infirmary, Edinburgh, Scotland, UK;(4) Department of Otolaryngology, Head and Neck Surgery, Freeman Hospital, NE77DN Newcastle Upon Tyne, England, UK |