1. Department of Otorhinolaryngology-Head and Neck Surgery; University of Brescia; Italy
2. Department of Otorhinolaryngology-Head and Neck Surgery; Catholic University Leuven; Leuven Belgium
3. University Hospitals Leuven and Department of Oncology-Section Head and Neck Oncology; Catholic University Leuven; Leuven Belgium
4. Unit of Head and Neck Surgery ; National Cancer Institute “Regina Elena,”; Rome Italy
5. Department of Oral and Maxillofacial Surgery; University Hospitals Leuven, Catholic University Leuven; Leuven Belgium
6. Department of Imaging and Pathology; University Hospitals Leuven, Catholic University Leuven; Leuven Belgium
7. Multidisciplinary Salivary Gland Society; Geneva Switzerland