1. Department of ORL, Head and Neck Surgery Helsingborg Hospital Helsingborg Sweden
2. Department of Clinical Sciences Lund University Lund Sweden
3. Department of ORL, Head and Neck Surgery Skåne University Hospital Lund Sweden
4. Department of Immunotechnology Lund University Lund Sweden
5. Department of ORL Royal Brisbane & Women's Hospital University of Queensland Centre for Clinical Research Brisbane Queensland Australia