1. Department of Otorhinolaryngology – Head and Neck Surgery Klinikum Stuttgart Stuttgart Germany
2. Department of Radiology Nuclear Medicine Unit, University of Tübingen Tübingen Germany
3. Department of Otorhinolaryngology – Head and Neck Surgery ASST Spedali Civili of Brescia Brescia Italy
4. Department of Medical and Surgical Specialties, Radiological Sciences, and Public Health University of Brescia Brescia Italy
5. Department of Otorhinolaryngology – Head and Neck Surgery IRCCS Ospedale Policlinico San Martino Genoa Italy
6. Department of Surgical Sciences and Integrated Diagnostics (DISC) University of Genoa Genoa Italy
7. Department of Otorhinolaryngology G. Gaslini Children's Hospital Genoa Italy