1. Department of Medical Oncology, Ghent University Hospital, 9000 Ghent, Belgium
2. DITEP, Gustave Roussy Cancer Centre, 94800 Villejuif, France
3. Department of Head, Neck and Maxillo-Facial Surgery, Ghent University Hospital, 9000 Ghent, Belgium
4. Department of Radiation Oncology, Ghent University Hospital, 9000 Ghent, Belgium
5. Department of Internal Medicine, Ghent University Hospital, 9000 Ghent, Belgium
6. Department of Pathology, Ghent University Hospital, 9000 Ghent, Belgium