1. Department of Head and Neck Surgical Oncology, Division of Imaging and Oncology Center University Medical Center Utrecht Utrecht the Netherlands
2. Department of Oral and Maxillofacial Surgery University Hospital Birmingham NHS Trust, Queen Elizabeth Hospital Birmingham UK
3. Department of Oral and Maxillofacial Surgery/Oral Pathology VU University Medical Center/Academic Centre for Dentistry Amsterdam ACTA University of Amsterdam and VU University Amsterdam Amsterdam the Netherlands