1. Department of Plastic Surgery, St John's Hospital at Howden, West Lothian, Livingston EH54 6PP, UK
2. Department of Pathology, Western Infirmary, Glasgow G11 6NT, UK
3. Department of Oncology, Beatson West of Scotland Cancer Centre, Glasgow G12 0YN, UK
4. Department of Otolaryngology, Head and Neck Surgery, Glasgow Royal Infirmary, Glasgow G4 0SF, UK