1. Department of Otorhinolaryngology NU Hospital Group Trollhättan Sweden
2. Department of Biomaterials Institute of Clinical Sciences Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
3. Department of Otorhinolaryngology Örebro University Hospital Örebro Sweden
4. Department of Otorhinolaryngology Karolinska University Hospital Stockholm Sweden
5. Division of CLINTEC Department of Otorhinolaryngology Karolinska Institute Stockholm Sweden
6. Department of Otorhinolaryngology Lund University Hospital Lund Sweden
7. Department of Otorhinolaryngology Sahlgrenska University Hospital Gothenburg Sweden
8. Department of Oral & Maxillofacial Surgery NU Hospital Group Trollhättan Sweden
9. Department of Surgical Sciences, Otorhinolaryngology Uppsala University Hospital Uppsala Sweden
10. Department of Clinical Sciences, Otorhinolaryngology Umeå University, site Sundsvall Umeå Sweden